Nowadays, with the increasingly coordinated development of regions, the study of population urbanization also urgently needs to be carried out from a broad regional perspective. Focusing on the three core issues of new urbanization, mamely, people, land, and property, the social, spatial, and economic attributes on population mobility are derived. Based on a comparison of the advantages and disadvantages of commonly used data methods in urbanization analysis, this paper constructs a new conceptual model for population urbanization in different scales with multi-source data. Using the census and survey data, mobile phone data, and enterprise registration data, the conceptual model is applied to an empirical study of urban dense areas-Yangzhou city and shows strong applicability, based on migration flow analysis, location identification, and enterprise headquarters-branch network analysis methods. The results show that: (1) At the regional level, due to the factors such as the threshold of settlement, family rights, and social security, population mobility is more cautious than capital flows. And it is compliant with the administrative district economy and urban hierarchy system. (2) At the municipal level, because the central city has greater advantages than the villages and towns, in terms of public service facilities and income levels, the urbanization form is mainly manifested in the direct connection between urban and rural areas, while the radiating and absorbing effects of key towns for population and enterprises are not strong. (3) In the era of ecological civilization, places with beautiful scenery, profound history, and rich cultural heritage are the natural soil for new economy. And the new economy has become a powerful engine for new urbanization in the late-developing areas. Yangzhou has a pleasant ecological environment and profound cultural atmosphere, which is the natural advantage and foundation of developing new types of economy. It needs to develop industrial platform, innovative environment, and innovation system to jointly create a comprehensive advantage of new economic development. Empirical research shows that the conceptual model has good applicability. It can identify the main pattern of economic and social linkages scientifically, reveal the intensive communicating area in town cluster region, and play a supporting role in delimiting urban development boundaries and optimizing the spatial pattern of land. Therefore, this model has a strong reference value for the study of regional coordination of territorial spatial plan at city and county level.

Resource and environment carrying capacity is the scientific basis and developing constraints of spatial planning. This paper combs the development of the concept, theory and practical application of carrying capacity, and points out the existing problems in research and application, such as concept's obscurity boundary, evaluation biased index calculation, and insufficient research on carrying capacity transmission mechanism. The reform of the spatial planning system and the changes in production modes, lifestyles and development modes in the new era have put forward new demands on spatial planning. It is necessary to explore and innovate the carrying capacity evaluation which is supporting the spatial planning: (1) Further clarify the conceptual connotation of carrying capacity and form a concept set; (2) Study the internal mechanism of carrying capacity and clarify the formation mechanism of carrying capacity; (3) Construct a multi-space scale, multi-evaluation unit's carrying capacity evaluation system to meet the needs of multi-level spatial planning. In practice, it should provide a scientific basis for determining the main indicators and main tasks of spatial planning according to spatial planning and spatial governance changes, supporting new goals of spatial planning, adapting to new modes of spatial governance, and taking new approaches to spatial governance.

The Communist Party of China's 19^th National Congress Report has clearly set the goal of "smart society" and put forward new requirements for the current development of territorial spatial planning. Nowadays, the empowerment of information technology based on the Internet, big data, cloud computing, etc. is the main driving force and development focus of the current practices of smart territorial spatial planning. How to understand and promote the development of smart society is the foundation of the compilation and implementation of smart territorial spatial planning. This paper emphasizes the importance of human-land relationship and the theory of urban life organism to the planning and governance of territory in a smart society. It points out that the overall conceptualization of smart territorial spatial planning should be transformed from informational empowerment to comprehensive empowerment, which includes technological empowerment and innovative empowerment. The paper constructs a smart territorial spatial planning framework-EPTI-based on the ideas of ecological civilization, people-oriented, technology integration application and institutional innovation, and discusses the paths toward smart compilation and implementation of territorial spatial planning.

The geosystem mainly studies the interaction mechanism between human and natural system on the surface of the earth, emphasizing the integration of human-land use relationship, natural and human factors, namely the human-land use coupling systems. Applications of the geosystem in the land space is mainly composed of geodecisions-making, geosimulation and geoengineering, and the interactions among these constitute geogovernance. Land space is the material carrier of the common practice of nature and human, the extent to which human shaped by nature is no less than that of opposite transformation, therefore, geosystem theory with the core of Coupled Human and Natural Systems has become the theoretical basis of land spatial planning and renovation. Based on the coupled human and natural systems, the remodeling of land space is ultimately reflected in various activities of human acting on the natural environment with the form of geogovernance. With the development of reform and opening-up for 40 years, Chinese land space has been basically in a relatively stable pattern and mainly consists of economic zones, poor areas and small towns, which is different from that of developed countries. We are in a state of "three-dimension-transformation coupling", i.e. urbanization, townization and ruralization. Thus, we must attach importance to the studies of strategic areas based on the Belt and Road Initiative, such as the Pan-Third Pole, the South China Sea Rim, and the Northeast Asia-Arctic. According to the theory of Coupled Human and Natural Systems and the value equilibrium of land space, the basic scientific problem of land space remodeling is the evolution and driving mechanisms of Coupled Human and Natural Systems. Land spatial planning can be divided into three types: Development planning, controlling planning and restoration planning. The protection and management of land space includes the whole area renovation with the core of land use, the systematic restoration with the core of ecological civilization, and the comprehensive management with the core of social harmony. The development goal of human activity system is to establish a community of shared future for mankind, correspondingly, that of the natural system is to establish a sustainable system, so the ultimate development goal of Coupled Human and Natural Systems is to form a community of shared destiny with the interaction between human and nature.

From the perspective of intergovernmental relations and government-market relations, this paper, based on the governance theory, analyzes the development process and overall trend of both Western developed countries' and China's spatial planning system under the influence of national governance changes. While spatial planning has become an important institutional reform and reconstruction system for China's ecological civilization construction, this paper hold the opinion that, under the goal of modern national governance, the reconstruction of the future spatial planning system should pay more attention to the following three questions: (1) The multi-attribute nature of "land space" should be fully understood, while the overall balance of spatial planning for multiple objectives should be emphasized; (2) A spatial planning system that corresponds to government affairs should be established; (3) Planning researches and non-statutory planning should be integrated into the spatial planning system to enhance the scientific nature of spatial planning.