The integration of the Guangdong-Hong Kong-Macao Greater Bay Area will inevitably encounter a series of frictions because of the cross-social system, cross-legal system and cross-administrative hierarchy. Research on the cooperation and conflict between Guangdong, Hong Kong and Macao is an important supplement to the integration study of the area. This paper reviews the process of integration development of the Guangdong-Hong Kong-Macao Greater Bay Area from 1997 to 2019 through the global news event database GDELT. The results show that: (1) the relationship between China's mainland and Hong Kong presents a "M" type fluctuation, and the conflict between them has been amplified by the news media compared with the mainland-Macao relationship. (2) The policy and public opinion between China's mainland and Macao are highly consistent, as the verbal cooperation between them is the leading factor of the interaction. (3) The interaction between China's mainland, Hong Kong and Macao has generally become closer, along with the increasing frequency of cooperations and conflicts. The importance of the mainland-Hong Kong relationship in the interactive relationship between Guangdong, Hong Kong, and Macao has been increasingly highlighted. (4) Material cooperation projects are still insufficient in the process of the regional integration of the Guangdong-Hong Kong-Macao Greater Bay Area, and there is an urgent need for diversified cooperation. The economic and technological competitions and cooperations between Guangdong and Hong Kong are the main factors affecting the interactive relationship between Guangdong, Hong Kong and Macao, as well as the tensions in Hong Kong. In the future, the coordinated development of the Guangdong-Hong Kong-Macao Greater Bay Area should focus on not only the projection of regional policies on space, but also its projection on social public opinion and the news media. It is necessary to combine the integration of physical space and virtue/discourse space, and strengthen the interactions between "hard connection" and "soft connection".

China's per capita GDP has reached 64520 yuan (about 10,000 US dollars). The development process of countries around the world and the inverted U-shaped curve of regional development gaps indicate that the evolution of China's regional development pattern will step into an inflection point segment and that the development gap between regions has witnessed a switch from continuing widening to narrowing. In this paper, we discuss the evolution process of China's regional development pattern over the 40 years since 1978 before the inflection point: (1) The gap in per capita GDP between the upstream areas (the top 9 most developed provinces) and the downstream (the last 8 underdeveloped provinces) increased from 407 yuan in 1978 to 53817 yuan in 2018. (2) Under the pull of export-oriented economy and non-state-owned economy, the mean center of urbanization and economic development rotates in a clockwise direction. Southeast China has become an area with accelerated economic agglomeration. (3) China's regional development pattern has presented a diamond structure with the four core regions of Beijing-Tianjin-Hebei, the Yangtze River Delta, the Pearl River Delta and Chengdu-Chongqing as the apex and the connection of adjacent regions as the boundary. The GDP in these regions accounts for about 75% of the national total. In 2020, China's regional development pattern will enter an inflection point of evolution. The form is characterized by the narrowing of the regional economic gap, which is essentially a transition from non-high-quality regional development to high-quality regional development. The high-quality development of the region is a process of growth in which the ecological and social benefits will be basically synchronized in the process of sustained economic growth, and a regional high-quality development model that is differentiated by geographical functions is presented. In the next 30 years, the regulation and optimization of China's regional development pattern should focus on three types of regions: key urbanization regions, relatively underdeveloped regions, and key areas for security, as well as inter-regional interactions according to the dual objectives of promoting regional balanced (coordinated) development and high-quality development. Establishing a space governance system with the major function zoning-strategy-planning-system as the mainstay will become the basic guarantee for regulating and optimizing the regional development pattern.

Beautiful China is the new goal of ecological civilization construction in the new era of socialism, which can meet the real needs of the people for a better life. National land space planning is a major deployment of the state to coordinate various types of space planning. Beautiful China is the new leading goal of the country's second centenary development. Its connotation is not only "ecological beauty", but also the comprehensive beauty of "economy-politics-culture-society-ecology". The construction of beautiful China needs a differentiated evaluation index system based on the local conditions. Beautiful China is closely related to the land spatial planning. The former provides an important direction for the latter, while the latter provides an important approach and space guarantee for the construction of the former. The establishment of land spatial planning needs to strengthen the further discussion of the regional system of human-environment interaction, point-axis system, the main functional area planning, sustainable development and resource environmental carrying capacity, new urbanization and rural regional multi-body system. This paper puts forward the thinking framework of land spatial planning from the perspective of geography, including scientifically analyzing the natural geographical conditions, economic and social development basis, and the interrelationship between land and space, planing the goal, vision and path of land and space, encouraging the public to participate in and carry out dynamic evaluation, and building an intelligent system platform for land and spatial planning with the goal of beautiful China, which provide ideas for the compilation and implementation of land spatial planning.

Transportation connection has always been one of the important perspectives of studying spatial cascading systems and urban systems. Based on the timetable data in 2018 of inter-city coach, high-speed train and aviation, this paper builds networks of the three modes of transportation in China. Through the methods of the city-pair connectivity and community detection, this paper compares the spatial structure and linkage systems of multi-traffic flow network and reveals the geospatial constraints. The research results show that: (1) Different modes of transportation are suitable for portraying urban systems on different spatial and administrative scales. Inter-city coaches are constrained by the provincial administrative boundaries. High-speed train network shows the effect of corridors especially along the main trunks. The aviation network reflects the spatial relationship at the national scale. (2) From the perspective of the direct accessibility, there is a large spatial overlap between inter-city coaches and high-speed trains, and the market of inter-city coaches is obviously squeezed in recent years. For air transport, its frequency advantage mainly concentrates on the city-pairs with a long distance. The competition and complementarity of the three modes of transportation have a great impact on the urban system and are useful for the understanding of the spatial cascading system. (3) Geographical space, infrastructure space and administrative space constraint and management system are important factors affecting the transportation networks. Inter-city coach network and high-speed train network are obviously affected by distance attenuation effects, and they present significant community structures in the two networks, but their communities have different spatial characteristics. However, air transport does not follow the constraint of distance attenuation, and there is not an obvious community structure in the network. Factors related to the passenger transport market, such as social and economic links and tourism resources, play the important roles in the aviation network structure.

There is a lack of basic theory and methods to examine the effect of administrative division (AD) on regional development. Based on the theory and practice of Chinese AD adjustments, this study defined the concept of administrative region potential (ARP) and developed a quantitative model to measure the ARP. Then, the model was validated using Chongqing as an empirical case. The results show that: (1) the ARP consists of energy of position (i.e., geographic space factors) and gravitational potential energy (i.e., administrative management system factors). Administrative division adjustment can change the ARP, thereby changing its path and driving force or regional development. (2) The ARP model of Chongqing city can objectively reflect the effects of administrative division adjustment events on Chongqing city. Specifically, the ARP includes variables of land jurisdiction, human capital level, fixed asset investment capacity, and administrative hierarchy of fiscal decentralization and administrative decentralization. (3) The ARP promotion has a significantly positive influence on the performance of local economic development in Chongqing city. (4) Reasonable AD adjustments will assist the region by integrating production elements and resources, enhancing the political power of the city, improving its ARP, and then promoting local economic development. The ARP model is proved to be an efficient method to understand and explain the regional effect of AD adjustment. It provides a new analytical perspective for the planning of AD adjustment in various regions, which can also be used as a practical method for assessing the effects of AD adjustment.