"Three rural issues" (issues concerning agriculture, rural areas, and farmers) is an important mainline of the CPC's centennial course of party building and China's urban-rural development. In order to solve the "three rural issues" in the New Era and promote the implementation of rural revitalization strategy, we hereby invite ten experts in the research field of "three rural issues" and rural revitalization research to conduct interviews. The interview mainly focuses on three perspectives: Historical process and institutional context, urban-rural system and cross scale space, and the integration of policy theory, technical methods, and rural construction practice. It revolves three main lines: The strategic stage and institutional changes of "three rural issues", the essence of "three rural issues" and the ways to solve new "three rural issues", and the rural revitalization mechanism and rural construction practice. The main conclusions are as follows: (1) The essence, key areas, and institutional mechanism innovation of the "three rural issues" in the context of spatio-temporal processes and institutional contexts. It is necessary to grasp the laws of "three rural" (agriculture, rural areas, and farmers) and diagnose the "three rural issues" from the perspective of urban and rural regional systems and even the global perspective space. The "three rural issues" is an optimization decision-making problem for improving the functions of rural regional systems within the overall framework of urban and rural regional systems. The imbalance in urban-rural development and insufficient rural development are the concentrated reflection of the "three rural issues" in the New Era. The crux of the "three rural issues" lies in the uncoordinated development of "human, land, and industry". The core goal of China's "three rural issues" in the new development stage is to move towards the common prosperity of farmers and rural areas. The corresponding development system and working mechanism of "agriculture, rural areas, and farmers" need to grasp the two "bottom lines", do a good job in the two "connections", and promote the two "integrations" in key areas such as national food security, farmers' livelihood development, modern agriculture and rural development, rural revitalization, and urban-rural integration development. (2) The theory of rural revitalization and the rural spatial planning under the requirements of urban-rural system interaction and people's common prosperity. The research and solution of China's "three rural issues" are rooted in the geographical theory of territorial system theory of human-environment interaction and location theory, the sector economy theory and the economic cycle theory, as well as the theory of development economics, sociological function theory and social conflict theories. In the research practice of the "three rural issues", land use transformation theory, rural reconstruction theory, rural development multi-body and multi-pole theory, interface theory, rural attraction theory, and rural sustainability have also been developed. The urban-rural integrated development and the common prosperity of the people should be the result of balanced regional development and Chinese path to modernization. The folk expression of "making rural life attractive" and the strategic goal of "basically realizing rural modernization by 2035" are mutually "exterior-interior" relationship, which can be comprehensively explained from the following three aspects: The spatio-temporal differences and path differentiation of rural settlement evolution and multi-functional transformation, and the phenomenon explanation of rural gentrification and the theoretical application of rural attraction in the context of urban-rural interaction, as well as the theoretical significance and practical path of rural modernization under the guidance of rural sustainability science. Improving local quality is an inherent requirement to meet the people's needs for a better life, and it is an essential requirement and general law of rural revitalization driven by innovation. As the edge of the national urban-rural system, rural areas face constraints such as segmentation, remoteness, low density, and insufficient heterogeneity dividends in improving local quality. Therefore, to improve local quality of rural areas, it is necessary to adapt to and alleviate the relative inefficiency of rural geography, and its important promotion paths include the characteristic development based on endowment, digital transformation and rural agglomeration centered around cities and towns. Guided by spatial planning and taking into account the integrated functional development of production-living-ecological spaces in rural areas, as well as the integration of urban and rural space through spatial planning, through promoting the quality of living space through comprehensive land improvement, assisting in the realization of multifunctional value in agricultural space through refined management, ensuring the sustainable use of ecological space through systematic protection and restoration, which is a solid foundation for rural revitalization and the construction of a new urban-rural relationship. (3) The path mechanism and technical support for the comprehensive rural revitalization and rural construction under the new needs of ecological civilization construction and governance modernization. Comprehensive rural revitalization requires the revitalization of industries, the reform of land, the development of human well-being, and the intelligent updating of technology. First, the essence of operating rural areas is the rational allocation of resources as the object of factors. It is necessary to integrate the high-quality development of agriculture with the high-quality and livable rural areas, promote the interaction and integration of urban and rural systems, actively link natural science, engineering technology innovation, and institutional innovation from the perspective of the big food concept, and implement food safety and important agricultural product supply security. Second, facing the new demand of rural sustainable development and governance modernization, we should innovate the property right governance integration mechanism of rural land system, especially actively build a rural green development mechanism with farmers' participation and an external benefit sharing mechanism of ecological environment governance. Third, it is urgent to break through the barriers that farmers share the gains from the appreciation of rural assets, fill the gap between small farmers and modern agriculture, and establish a concept of county governance that meets the needs of Chinese path to modernization. Fourth, rural construction is an organic combination of the governance of public spaces by the state and the daily life practices of farmers. Through the theory and technology of "computational" rural areas, effective connection and information sharing between the state and rural areas can be achieved, promoting coordinated development from micro to macro, and from local to whole. And we should achieve the aim of building livable, suitable for work, and beautiful rural areas, through multi-level main body co-construction, co-governance, and management. To sum up, the interview views can provide theoretical reference and decision-making reference for the "three rural issues" work innovation and rural revitalization practice towards Chinese path to modernization.

In the era of digital economy, the tourism development model based on traditional natural and human resources can no longer effectively meet the diversified and personalized needs of tourists. Some non-traditional tourism resources in digital platforms have attracted a large amount of attention capital and converted into tourism flows, which greatly expands the content and boundaries of tourism resources. The emergence of the flow economy has not only profoundly affected the development model of tourism, but also posed new challenges to the theory and practice of tourism resource development. Interviews show that: First, the formation of the flow economy is not a coincidental phenomenon; although the spread of flow leads to the expansion of attention capital scale and drives tourism development, the core of tourism development lies in tourism resource endowment, tourism service quality, government support and guarantee, etc. Second, the flow economy drives the recombination, agglomeration and diffusion of tourism supply and demand factors, and quickly caters to the individual needs of tourists, while whether the tourism industry can adjust its service supply capacity in response to changes in tourist demand becomes the key path and mechanism for the flow economy to promote tourism development. Third, in order to promote the flow economy to empower the high-quality development of tourism, it is necessary to combine effective market and active government, and to establish the brand of tourism. We can also make full use of the spatial effect of the flow economy to promote the collaborative development of regional tourism. Finally, after the tourism boom triggered by the flow economy, it is also necessary to calmly consider the mismatch of resources, negative environmental effects, cultural conflicts and contradictions between short-term hotspots and long-term investment. Only in this way can tourist destinations follow a sustainable development path.

The protection and utilization of traditional villages is not only a major practical issue to realize China's rural revitalization and Chinese-style modernization, but also a hot topic in the integration and cross-research of geography, sociology, planning, economics and other disciplines. In order to systematically explore the theoretical cognition, practical problems, system mechanism, practical experience and effective path of the protection and utilization of traditional villages in China, 11 experts in the research field of traditional villages were invited to conduct interviews. The interview mainly focuses on the classification of Chinese traditional villages from three perspectives: policy change and typical model, macro mechanism and core theme, theoretical cognition and practical path, and focuses on specific practices such as industrial integration, landscape protection, vitality, value realization, subject drive, spatial governance and locality, based on the theoretical understanding of the macro system and mechanism for the protection and utilization of Chinese traditional villages. Advanced theoretical and practical issues such as industrial integration, landscape protection, organic renewal, vitality, value realization, subject drive, spatial governance and locality were discussed in depth. According to the main views of the experts, the protection and utilization of China's traditional villages in the new era should focus on: (1) The main problems of protection and utilization of Chinese traditional villages facing the impact of rapid urbanization and modernization, the innovation of mechanism and system, and the realization path. In view of the conflict between modern civilization and agricultural civilization faced by traditional Chinese villages and the major strategic needs for national rural revitalization and Chinese-style modernization, the combination of "top-down" and "bottom-up" is adopted to build a diversified integration mechanism featuring multi-subject participation, organic integration of agriculture, culture and tourism, and overall coordination. By exploring the endogenous growth factors of traditional villages and the historical inheritance and cultural context of traditional villages, strengthening the leadership of rural grassroots party building, giving play to the role of villagers as the main body, reshaping the public cultural space system of traditional villages and all-round digital twin modeling, etc., we will create a living environment that is in line with modernization development and ecological civilization construction and jointly build a cultural map, to realize the transformation of traditional Chinese villages from "vegetable gardens" and "back gardens" to "spiritual homes". (2) Core themes and specific spatial practices of protection and utilization of traditional Chinese villages for rural revitalization and Chinese-style modernization. Focus on the core themes of traditional village classification, industrial integration, organic renewal, landscape protection, vitality, value realization, subject drive, spatial governance and local reconstruction, and strengthen the classification and classification of traditional villages based on the coupling of key factors such as "livelihood, water, food, energy and land"; focus on the significance, connotation and influence mechanism of the time dimension, space dimension and attribute dimension of traditional village industrial transformation; focus on the three tasks of "protection and development countermeasures, measures to improve people's livelihood, and strategies to activate utilization" to promote the organic renewal of traditional settlements; emphasis should be placed on the gene protection and inner spiritual value mining of traditional human settlement cultural landscape, the "living" protection and utilization of traditional living space and the "activation" of traditional cultural heritage; focus on the diversification of traditional village activities, "co-construction, co-governance and sharing" and the construction of beautiful villages; the importance of natural non-human elements and human beings as spatial order construction and place construction of traditional villages and their active practice are emphasized to promote the realization of multi-functionality and multi-value of traditional villages. Pay attention to the excavation of traditional cultural heritage and intensive and efficient material space, create a harmonious and comfortable social space and protect and inherit traditional culture space; focusing on rural elements such as "ecology, culture, subject, and industry", strengthening ecological background, inheriting and developing local culture, balancing capital advantages and local embeddedness among local and cross-local subjects, so as to realize local reconstruction and characteristic remodeling of traditional Chinese villages.

Under the strategy of accelerating the effort to build China into a country with a strong transport industry, local governments have actively carried out urban rail transit construction and promoted transit-oriented development (TOD) within the transit-serving areas, which has gradually generated significant social and economic effects. Indeed, urban China has issued a series of national or regional planning outlines and policies to promote the high-quality development of urban rail transit infrastructure and the associated land-use planning. Currently, to what extent urban rail transit can produce a land premium effect still remains controversial, which is significantly affected by contextual factors and research design. For the differentiation results of the premium effect in urban rail transit, a sample of 298 observations from 44 published journal articles was investigated by using a meta-analysis regression approach, and the influencing factors of differentiation results were discussed from two aspects: contextual factors and research design. The results of the meta-analysis regressions would be helpful to promote both economic development and social equity. The findings show that: (1) Urban rail transit can produce a certain land premium effect based on the transport mode substitution and land development evolution effects, but the rail transit premium effect presents significantly differentiated results based on different contextual factors and research design. (2) Contextual factors such as assessment objectives, rail transit maturity, and accessibility features are major factors influencing rail transit and land premium connections; different methodologies adopted will also influence rail transit premium evaluation results. Compared to the hedonic pricing model, the premium impact evaluated by the multi-period price change and local linear regression methods presents a higher result, while the difference-in-difference model has a lower result. (3) The premium effect of rail transit has dynamic complexity. Concerning the economic and social impact of urban rail transit, mechanisms such as land value capture can be constructed to promote the sustainability, equality, and accessibility of rail transit services.​

Urban-rural integrated development is an important way to coordinate the national strategies of new urbanization and rural revitalization. It is also crucial for Chinese-style modernization. To comprehensively tackle challenges facing the current urban-rural integration in China, explore the path of coordinated urban-rural governance, and clarify the strategies for urban-rural integrated development, experts from various fields were cordially invited to engage in in-depth discussions on pressing issues related to urban-rural iintegrated development. These issues include the trends and pathways of urban-rural integration in contemporary China, Innovation of institutions and mechanisms for urban-rural integration, implementation pathways for territorial spatial planning, emerging rural business models and rural transformation pathways, high-quality development pathways for urban-rural integration in different regions, and the path of promoting urban-rural integrated development through comprehensive land consolidation. These discussions aimed to advance theoretical research and practical planning of urban-rural integrated development in China. Attentions need to be paid in urban-rural integrated development in the New Era on: (1) The primary obstacles and innovative pathways in the institutions and mechanisms of urban-rural integrated development guided by comprehensive coordination and regional interconnectivity. Constructing an infrastructure and public service system that effectively connects and complements urban and rural areas, accelerating the coordinated development of urban and rural areas using counties as the carrier, and promoting the flexible governance of this population while concurrently achieving integrated governance of urban-rural natural and social system. Promoting cross-border governance, encouraging cooperation and assistance between eastern and western regions, and achieving regional-scale coordinated development between urban and rural areas. Underdeveloped regions in both Central and Western China should strengthen the linkage role of counties and small towns. This involves enhancing their attractiveness for the inflow of talent, technology, and capital, and driving the transformation of industrial structures towards digitization, intelligence, and low. In contrast, developed regions in the Eastern China should establish a spatial structure system with multiple focal points, network layout, and clear hierarchies. They should expand the breadth and precision of urban-rural factor mobility, and promote the transformation and upgrade of traditional infrastructure and public services, aiming for inclusive development. (2) Optimizing the allocation of resource elements driven by the "planning-utilization-consolidation" cycle in territorial spatial management to achieve shared urban-rural governance and rural reconstruction. Anchoring the spatial pattern of urban and rural development through territorial spatial planning, optimizing the urban-rural spatial layout during planning implementation. Ultimately, improving the spatial quality organic renewal and driving bidirectional flows of diverse elements between urban and rural regions. Place emphasis on rural functional provision, resource utilization orientation, and industrial development models, uncovering multifaceted rural functions including production, lifestyle, ecology, and landscapes. Exploring regionally adapted industrial integration models that enhance agricultural and rural development vitality through distinctive features and high efficiency gains. We also should enhance the leading role of comprehensive land consolidation policies, incentivize and support active private capital involvement, promote resource integration and value enhancement. Strengthening urban-rural industrial synergy and integrated development, and facilitating the orderly flow of urban-rural resource elements. (3) Enhanced awareness and innovative practices in targeted urban-rural governance and rural transformation supported by digital technology and intelligent platforms. Establishing an urban-rural data sharing platform helps bridge the "digital divide" in urban-rural integrated development and enables refined governance across urban and rural areas. Deeply apply the technologies like 5G, Internet of Things (IoT) to support the transformation and upgrade of conventional infrastructure. Expanding the coverage of digital devices in rural basic facilities, and utilizing digital technology to integrate cultural resources across urban and rural areas. Promoting the deep integration of the digital economy and the physical economy involves linking consumer markets through the internet and digital technology, establishing diverse channels for agricultural product distribution, and stimulating the transformation of consumption patterns and the enhancement of consumption capabilities for both urban and rural residents. Embedding digital technology into rural industry development and social governance processes to facilitate the intelligent transformation of agricultural production, digitalization of rural industry development, smartification of rural administrative affairs, and establishment of a digital grid for rural social governance. The aforementioned viewpoints can provide theoretical support and decision-making foundations for achieving the goal of urban-rural integrated development oriented towards Chinese-style modernization.

Urban-rural integration is a crucial avenue for the low-carbon transformation of national spaces, particularly in understanding its mechanisms for low-carbon land use within the context of regional integration. Employing the ESTDA framework and spatial econometric models, we quantified the spatio-temporal dynamics of urban-rural integration's impact on low-carbon land use in the Yangtze River Delta. This involved assessing the development level of urban-rural integration and the efficiency of low-carbon land use. Our analysis revealed the following findings: (1) Between 2005 and 2020, the Yangtze River Delta experienced a fluctuating upward trend in both urban-rural integration development level and low-carbon land-use efficiency, with notable regional disparities and a spreading pattern centered around the region's central cities. (2) A significant positive spatial correlation was observed between urban-rural integration and low-carbon land use efficiency, with an increasing spatial dependence. Local patterns remained stable, showing spatial clustering convergence for both high-high (HH) and low-low (LL) types. (3) In contrast to the evolution of low-carbon land use patterns, urban-rural spatial integration exhibited weak correlations, with local patterns and dynamic transitions displaying path-dependent and spatially locked features. (4) Urban-rural integration emerged as a key factor influencing low-carbon land use, with each 1% increase in its development level resulting in a 0.2% increase in local low-carbon land use efficiency. Among the control factors, the direct effects of technological inputs and the degree of opening up were positive, while the direct effects of financial and ecological pressures were negative. Fiscal stress, environmental regulation, public service facilities, and land marketization showed no significant spatial spillover effects. The results of our study provide references for formulating low-carbon and efficient land-use policies, promoting high-quality development through the integration of urban and rural areas.

Ecological product value realization is not only an important bridge for the transformation of the "Two Mountains", but also an effective tool for accelerating new urbanization and rural rejuvenation. It is important to clarify its practical logic to achieve the Chinese path to modernization and promote the construction of ecological civilization. Based on 87 typical cases in the field of natural resources, using the grounded theory method, this study analyzes the process of ecological product value realization according to the procedure of "Open coding-Axial coding-Selective coding". Finally, a general explanatory framework for it is constructed. The results show that the internal logic of the whole process of ecological product value realization is "Identifying the resource base-Synergizing multiple mechanisms-Producing comprehensive benefits". The identification of the resource base is to clarify the direction of development. The synergy of the preparation mechanism, implementation mechanism, and guarantee mechanism is the driving force to convert and enhance the value of ecological products. Ultimately, the organic unity of ecological co-governance, ecological co-prosperity, and ecological co-sharing is realized through the production of ecological benefits, economic benefits, and social benefits. The study is a useful attempt to explore the theory of ecological product value realization, which can provide a constructive reference for improving the mechanism and implementation path of regional ecological product value realization.

New quality productive forces are the core driver for building a modern tourism sector and also support the development of a strong tourism nation. In order to deeply understand the scientific connotation of new quality productive forces and clarify the theoretical logic and strategic path of new quality productive forces empowering the high-quality development of tourism industry, several experts on regional economic development, the digital economy, tourism management and geography were interviewed. The interviews were based on the logic of "problem orientation-innovative thinking-path mechanism", focusing on the background, opportunities and challenges, core meanings, drivers, and innovations empowering the high-quality development of tourism new quality productive forces. There were three main conclusions from this research. The first was the strategic opportunities and risks of promoting the high-quality development of tourism through new quality productive forces against a background of rapid and continuous technological change. New quality productive forces optimize resource allocation through scientific and technological innovation, and improve the production efficiency and growth quality of tourism. They also produce new tourism development models and forms of business, constantly generating momentum to drive high-quality economic and social improvements. Especially in rural tourism, the role of new quality productive forces is particularly significant. It promotes the gradual improvement of the rural tourism production network, enhances cooperation among rural tourism stakeholders, helps rural tourism participants evolve new production initiatives, and ultimately reinvigorates rural areas with increased prosperity. However, given globalization and rapid digitalization, innovation in tourism faces a series of challenges. In particular, the lack of systematic development of tourism software and hardware, risks of data security and privacy protection, resistance to change and innovation in traditional tourism, and the "growing pains" brought by the transformation to new technologies deserve attention. The development of new quality productive forces in future tourism must focus on technological innovation, find and prepare a quality tourism workforce, optimize and more closely integrate products and services with human talent, and significantly improve the total factor productivity of tourism. Second, the process of empowering the high-quality development of tourism must encompass technological innovation leading to industrial modernization. Innovation plays a leading role in new quality productive forces and is the core driver of the high-quality development of tourism. The new quality productive forces empowering this tourism development have several specific features. Technological innovation leads the modernization of the tourism sector and is a prerequisite for the high-quality development of tourism. Factor integration and supply-demand matching are the intrinsic requirements for the high-quality development of tourism. Other critical ingredients are digitization, greening and artificial intelligence. The significant improvement of total factor productivity must be the core goal for the high-quality development of tourism. Third, the guidance of national strategy is crucial to the progress and prospects for new quality productive forces empowering the high-quality development of tourism. New quality productive forces are receiving widespread emphasis since their inception and have become a core issue highly valued by the tourism sector in China. In the New Era, modern technology has become a key production factor in tourism. Additionally, the transformation and upgrading of tourism is dynamically advancing, growth is strengthening, and the ability of tourism to serve national economic and social-cultural strategies is becoming more noticeable. However, it should not be overlooked that high-quality tourism development is still faced with serious problems such as weak technological innovation capabilities, uneven regional development, inadequate circulation of factor resources, and insufficient human talent for tourism. To further enhance the beneficial impacts of new quality productive forces in stimulating the high-quality development of tourism, it is necessary to focus on deepening the reform of the system and operations in tourism, optimizing the creative allocation of tourism production factors, accelerating the development of a modern tourism sector, and improving the quality of professional tourism talent. These three recommendations will not only enhance the understanding and application of new quality productive forces to a certain extent, but also provide decision-making support for building China into a leading tourism nation in the world.

Food security is the foundation of China. This paper uses the panel data of the national rural fixed observation points from 2017 to 2019, with the fixed effect model to analyze the impact of land transfer on the "non-grain" crop production. The study found that: (1) On the whole, land transfer did lead to the "non-grain" of agricultural land. (2) Land transfer has a differentiated impact on farmers with different farmland scales. Instead of promoting non-grain crops, land transferred to farm households with a farmland scale of less than 10 mu tend to promote grain crops; land transfer does not show significance on the crop production decisions of households with land operating scale between 10-20 mu; while land transferred to households with scale above 20 mu are more inclined to planting "non-grain" crops. Accordingly, this paper suggests that: (1) In order to save the cost of supervision and management, the government can focus on the supervision of medium-sized and above entities, so as to improve the efficiency of the supervision of "non-grain" of agricultural land. (2) For small-scale farmers, the government does not need to intervene too much at present, but should improve the land transfer market and reduce the transaction cost of land transfer subjects by solving the problems of opaque information, high information acquisition cost and high rent in land transfer.

The mismatch between ecosystem service scale and human governance scale is one of the causes of ecosystem service degradation. Defining ecosystem service stakeholders is the first step to understand and solve this problem. This study introduces Bourdieu's practical theory perspective, proposes an analytical framework for the definition and identity change mechanism of ecosystem service stakeholders, and provides practical attempts and research ideas from the field of ecosystem services for the application and development of stakeholder theory. The research shows that stakeholders are important social attribute variables in the ecosystem service feedback mechanism, and exist in the hierarchical spatial structure, showing special attributes such as competitive dynamic balance and differential weight rank, and are benefit objects for achieving the goals of ecosystem service management. The evolution of stakeholder theory and the classification criteria of stakeholder types are helpful for the discussion of stakeholder definition of ecosystem services, but there are some differences in adaptation. The introduction of Bourdieu's practice theory, which embodies the unique research perspective of comprehensiveness, relationship, fuzziness, generation and reproduction, can provide an analytical framework composed of core concepts such as field, habitus and capital for the definition of ecosystem service stakeholders. It also provides a way to explain the mechanism of identity change. At the same time, in response to the development orientation and trend of the integration of regularist "value" and positivist "fact" of stakeholder theory, it expands its theoretical interpretation boundary and brings practical attempts in the field of ecosystem services. Based on this analysis framework, the paper proposes further research directions for institutional design from the political, economic, social and cultural fields, and tries to explore the establishment of an institutional system that starts from stakeholder definition to regulating the mismatch between ecosystem service scale and human governance scale.

Boosting the internal impetus for rural development is key to promoting high-quality rural development and constructing livable, workable, harmonious and beautiful villages. To this end, existing studies call for neo-endogenous rural development through the collaboration of actors within and outside villages. However, most of the studies discuss this issue at the conceptual level, which still needs a systematic framework to provide action guide. Addressing the gap, this study combines the symbiotic theory and neo-endogenous development pattern, and builds a research framework with three dimensions of the symbiotic unit, symbiotic pattern and symbiotic environment. Taking the "Rural Operation" practice in Lin'an district in Hangzhou as the case, this study identifies the path and mechanisms of the symbiosis of multiple actors within and outside villages to realize neo-endogenous rural development. This study finds that: (1) Local forces, social forces and government forces constitute the basic symbiotic units, respectively assuming the roles of endogenous power, localized intermediary and platform constructor. (2) Neo-endogenous rural development is embedded in a multi-scale symbiotic environment of state, market and local spaces. Multiple action logics, including the state administrative logic, market economic logic and local cultural logic, exist in the environment. (3) In terms of the symbiotic pattern, symbiotic units need to build deep and multiple linkages with each other, establish shared values, and construct a governance system with formal and informal institutions, to enable the stability and sustainability of the symbiotic relationship. This study also provides practical implications for boosting the internal impetus for rural development and promoting rural revitalization, from the perspective of symbiotic theory.

At present, the urban renewal action of Wuhan has changed from large-scale demolition and construction to the era of "retaining, replacing and dismantling". The transformation mode has also changed from local transformation to continuous renewal. In the current era, it is particularly important to identify urban "retained, replaced and demolished" units intelligently. Recently, the combination of AI and remote sensing has been widely used for the identification of typical surface features of natural resources, cultivated land protection, and law enforcement supervision. In this paper, we combine AI and remote sensing to identify "retention, reconstruction and demolition" units. First, we establish training samples of the "retention, replacement and demolition" unit, then use the deep learning network to establish the artificial intelligent model, and finally select the remote sensing data to carry out the identification of "retention, replacement and demolition" unit in Wuhan. The integration of remote sensing and deep learning improves work efficiency of the identification of "retaining, replacing and dismantling" units, and provides scientific basis for solving the pain points in urban renewal.

As the ecological foundation for building a beautiful China and achieving harmonious coexistence and modernization between humans and nature, national parks are an important content and implementation path for China's ecological civilization construction. However, most of China's national parks are located in relatively remote and impoverished rural areas, facing severe conflicts between livelihood development and ecological protection. Building sustainable livelihoods has become an urgent theoretical proposition and task of the times. With the help of CiteSpace knowledge map analysis, we reveal the change process and research characteristics of sustainable livelihood research topics in national parks at home and abroad, and tease out the research status of the major topics, which include the livelihood conflicts between the residents and wild animals, the residents' livelihood dependence on resources, the impact of the construction of the national park on the residents' livelihood and the alternative livelihood in the national park. In response to the new requirements of sustainable livelihood research in Chinese national parks in the New Era, we construct a research framework for sustainable livelihoods in national parks and propose that the research on sustainable livelihood of national parks in the New Era should integrate multidisciplinary theories and technical methods, strengthen data driven and scientific and technological empowerment, focus on some key issues, such as dynamic monitoring and evaluation of the livelihoods sustainability, the relationship and mechanism between livelihoods and ecology, and the implementation path and mechanism of sustainable livelihoods in national parks.

Commons often lead to a "tragedy of the commons" because they can be accessed freely, that is, overexploitation of commons usually leads to resource degradation. Since Garrett Hardin published an article "Tragedy of the Commons" in Science in 1968, there has been an increasing number of studies on commons governance to avert the tragedies. With the development of urbanization, industrialization and increase of population, the overexploitation of natural resources by human activities has become increasingly serious, such as air pollution, carbon emissions, marine pollution, and depletion of mineral resources In order to promote the sustainable use of commons, it is necessary to review the theoretical and practical progress of the "tragedy of the commons" theory and its related study of governance. Therefore, this paper first reviews the theory of "tragedy of the commons". Then, obtaining 43830 paper, documents, etc. from Google Scholar that have cited Harding's articles by the end of 2020, this paper analyzes the keyword time series of these citing literatures, and combines with the development context of the research to summarize the progress of theory. We found the theoretical progress includes five aspects: examination of "Tragedy of the Commons" theory, analyses of the property right system of public resources, multiple governance types of commons, sustainability analysis of Social-Ecological Systems (SES), and governance of global resources. Their inspirations for sustainable governance in China are: (1) There is no "panacea" for resource governance, and it is necessary to explore the "diversification" of the system; (2) Accelerate the improvement of the property rights system for natural resources, and build a property rights system for natural resources owned by all the people, based on China's national conditions; (3) Implement multiple governance types on natural resources and build a collaborative, co-governance and shared environment; (4) Implement systematic governance of natural resources to promote the harmonious coexistence between human and nature; (5) Govern global resources through institutional innovation, and build a community with a shared future for mankind. The review of the development of "the tragedy of the commons" and its governance can provide important theoretical and practical enlightenment for the sustainable development of China's resources and environment and the modernization of governance capabilities. This also indicates an interdisciplinary academic innovation path and proposes potential research directions.

As a new type of agriculture, urban agriculture is related to the flow of urban-rural food elements and energy conversion, and it has become a new format for coordinating urban-rural integrated development. Based on the perspective of urban-rural integration and the flow of elements, the paper takes the Guangdong-Hong Kong-Macao Greater Bay Area (GBA) as the research area, aiming to explore the process and mechanism of urban agriculture's type differentiation, functional evolution and spatial transformation, and to compare and analyze the logical mechanism between different typical types of urban agriculture. The results show that: (1) The three typical types of urban agriculture in the GBA, namely, community supported agriculture, migrant agriculture and leisure agriculture, have differentiated spatial functions, transformation processes, and spatial effects. (2) Community supported agriculture strengthens ecological functions through ecological planting and breeding, and realizes economic functions through short-chain sales, cooperative production, and live broadcast delivery, which leads to the improvement of space quality and the transformation of urban consumption of space. (3) Migrant agriculture emphasizes the economic function, and the transformation process of its material space is reflected in the non-grainization and concentration of cultivated land and the differentiation of community living space, which in turn brings about group exclusion and spatial isolation in social space. (4) Leisure agriculture emphasizes the social security function and the experience and emotional needs of urban groups, and reflects the differences and imbalances in social development in terms of spatial transformation, which further exacerbates the complexity of social relations and the differentiation of spatial benefits. (5) The functional evolution and spatial transformation of typical types of urban agriculture are affected by the comprehensive effects of multiple subjects such as the market, government, enterprises and individuals, and factors such as urban and rural economy, society, technology and culture have an important impact on the direction and degree of spatial differentiation of urban agriculture, and provide new pathways and new models for urban-rural integration through food, community and industrial linkages.