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05 February 2022, Volume 42 Issue 2
 The Connotation and Mechanism Changes of Coordinated Development of the Guangdong-Hong Kong-Macao Greater Bay Area in the New Period Yuyao Ye, Xiangyu Wang, Jili Xu, Hong'ou Zhang, Zhengqian Liu, Jiayi Sun, Qin Lu 2022, 42 (2):  161-170.  doi: 10.13284/j.cnki.rddl.003442 Abstract ( )   HTML ( )   PDF (934KB) ( )   Regional coordinated development is a complex, systematic and scientific issue advancing with the time which has attracted much attention. The Guangdong-Hong Kong-Macao Greater Bay Area (GBA) aims to develop into a world-class bay area and urban agglomeration. The development of GBA depends on regional coordinated development to enhance its international competitiveness. At present, the process of globalization has experienced multiple turning points, the regional governance system has been continuously optimized, and the technological innovation has evolved rapidly. The coordinated development of the GBA is facing institutional changes. Therefore, through the systematic analysis of the connotations and mechanisms of the coordinated development of the GBA, this paper describes the three stages of regional coordinated development since 1978, including the integration of regional production factors represented by the ‘front shop, back factory’ mode (1978-1996), the regional system integration led by institutional cooperation (1997-2014), and the regional all-round integration guided by national strategy (2015- ). In the meantime, the paper analyzes the five dimensions of the coordinated development of the GBA in the new period, including industrial collaborative innovation, environmental collaborative governance, resource collaborative allocation, service collaborative sharing and institutional collaborative arrangement. These five dimensions are helpful to understand the key areas to promote the coordinated development of the GBA in the coming decades. Furthermore, this paper holds that the regional coordinated development of the GBA is undergoing mechanism changes at four levels, which are mainly reflected in the transformation of globalization, the integration of the internal and external market, the rescaling of governance, and the energization of regional in-depth development facilitated by the new infrastructure. These institutional changes have the potential to generate a new model for the coordinated development of the GBA. This paper takes into account the retrospective review and forward-looking prospect on the coordinated development of the GBA, aiming to provide an entry perspective and analysis framework for related issues.
 Differences of Strategic Coupling Modes and Regional Collaboration in the Guangdong-Hong Kong-Macao Greater Bay Area Jiehan Ji, Yi Liu, Murong Mei, Xiaoling Zhu 2022, 42 (2):  171-182.  doi: 10.13284/j.cnki.rddl.003436 Abstract ( )   HTML ( )   PDF (1253KB) ( )   The current research on regional collaboration lacks the research perspective of global production network, which makes it difficult for the research on the collaboration of the Guangdong-Hong Kong-Macao Greater Bay Area to recognize the differences in the development of strategic coupling modes of various cities in the Greater Bay Area, and to clarify the differences in the status and division of labor of these cities in the global production network. These differences are the key to the coordinated development of the Greater Bay Area. Therefore, based on the theoretical framework of the global production network, this study uses the variable of strategic coupling to analyze the development of the strategic coupling mode of the cities in the Greater Bay Area and the differences in their status and division of labor in the global production network, so as to further understand the coordinated development of the Greater Bay Area. There are three main findings in this study. First, the strategic coupling mode and evolution process of Guangdong, Hong Kong and Macao are essentially different, belonging to different global production networks. Hong Kong has experienced two processes of dependency coupling to decoupling in the development of local manufacturing and the later "having stores in front and factories behind" mode, forming a mutually beneficial coupling mode in the financial industry. Macao has experienced two processes from dependency coupling to decoupling in the manufacturing industry, forming an absorption coupling mode in the gambling industry. Second, there are also significant differences in the strategic coupling modes of cities in the Pearl River Delta. Each city is embedded into different global production networks through different leading industries. Third, under the influence of the strategic coupling differences of the above two scales, the regional economy of the Greater Bay Area does not gradually move toward coordinated development, but presents the characteristics of less connection-collaboration-collaborative difficulties. The core argument of this paper is that the differences of strategic coupling mode lead to the embedding of cities into global production networks with significant differences in economic cycles, production systems and technological structures, making it difficult to achieve the overall regional collaboration. And the contribution of this study is that with the help of the global production network theory, it provides a new interpretation perspective for regional collaboration research, reveals the difficulties of regional collaboration in the Greater Bay Area, enriches the study of the long-term dynamic evolution of relational economic geography, and provides some suggestions for the formulation of collaborative policy.
 The Geographical Pattern and Diversity of Strategic Industry Technological Innovation in the Guangdong-Hong Kong-Macao Greater Bay Area Kangmin Wu, Yuyao Ye, Hong'ou Zhang, Zuxin He, Xiangyu Wang, Zhijun Zheng 2022, 42 (2):  183-194.  doi: 10.13284/j.cnki.rddl.003438 Abstract ( )   HTML ( )   PDF (2156KB) ( )   The dynamics of innovation in geographical space is closely related to the regional development trajectory. Evolutionary economic geography points out the path dependence characteristics of regional development, and emphasizes that the direction of regional development is rooted in the original industrial and technological structure characteristics. Therefore, the geographical pattern of technological innovation and the identification of its diversity characteristics are of significance to the realization of regional innovation and the evolution of industrial structure. From the perspective of strategic industry, this paper aims to reveal the geographical pattern and diversity characteristics of technological innovation in strategic industry in the Guangdong-Hong Kong-Macao Greater Bay Area (GBA). Based on the point scale spatial data of invention patents in the GBA and by means of connecting strategic industry with national economy industry classification code and patent IPC classification code, the invention patents of six major industries in the GBA are extracted, which are the new generation of electronic information industry, automobile industry, green petrochemical industry, new energy industry, advanced material industry and intelligent robot industry. And the nuclear density analysis, standard deviation tail value test, entropy method and average nearest neighbor distance analysis are used to identify the spatial distribution characteristics and differences of multiple types of technological innovation in the GBA. The results show that the geographic pattern of technological innovation in the GBA presents a significant spatial imbalance. At the regional scale, Guangzhou and Shenzhen are the two agglomeration cores. There is a large gap in the innovation ability between the east and west sides of the Pearl River. The accumulation of technological innovation on the east bank is much higher than that on the west bank. The innovation profile line on the east bank has formed two obvious peaks in Guangzhou and Shenzhen. The high value of the innovation profile line on the west bank is mainly concentrated in Guangzhou and Zhuhai, and the peak value is far lower than that on the east bank. The location of technological diversity is mainly distributed in the core areas of the GBA, mainly including Yuexiu District and Tianhe District in Guangzhou, Nanshan District and Futian District in Shenzhen, Binhai District in Dongguan and Xiangzhou District in Zhuhai. And the distribution characteristics of technological innovation data of different industrial types are different. The innovation of the new generation of electronic information industry, advanced materials industry and green petrochemical industry accounts for 51.67% of the total innovation in the GBA. The innovation of different technological types shows obvious spatial differentiation. The innovation agglomeration degree of the new generation electronic information industry is the highest, with the R value of 0.0576. And its observed value of the average nearest neighbor distance between invention patents is 32.03 m, which belongs to the minimum value in the selected analysis industries, showing strong agglomeration characteristics. There are differences in the distribution characteristics of the agglomeration core of the six major industries in the GBA. The common ground is that they have formed the largest two agglomeration cores in the core areas of Guangzhou and Shenzhen, covering Yuexiu-Tianhe area in Guangzhou and Futian-Nanshan-Luohu area in Shenzhen. And the spatial distribution is mainly concentrated in the core areas of Guangzhou, Shenzhen, Dongguan and Zhuhai. Among them, the spatial agglomeration degree of the new generation of electronic information industry innovation is the highest. Agglomeration and multi-dimensional proximity, diversity and path dependence are the main mechanisms for the formation of the geographical pattern of technological innovation in the GBA, and these two key mechanisms promote the formation of current multi-type technological innovation space in the GBA.
 Spatiotemporal Characteristics and Sources of River Nitrogen in Typical Urbanized Areas in the Guangdong-Hong Kong-Macao Greater Bay Area Manzi Li, Aiping Zhu, Ying Wang, Jianyao Chen, Zuobing Liang, Qirui Wu, Di Tian, Gang Zeng, Liangjie Zhao 2022, 42 (2):  318-327.  doi: 10.13284/j.cnki.rddl.003441 Abstract ( )   HTML ( )   PDF (2240KB) ( )   A typical urbanized area in the Guangdong-Hong Kong-Macao Greater Bay Area, Liuxi River-West Channel-North Channel in Guangzhou City, was used to reveal the impacts of rapid urbanization on riverine nutrients. Two field campaigns were implemented in both wet and dry season, e.g. July 2020 and January 2021. Forty surface water samples were collected to analyze indicators such as major ions and stable isotopes (δ15N-$NO3-$, δ18O-$NO3-$ and δ15N-$NH4+$) The spatiotemporal characteristics and sources of river nitrogen in the study area were explored by using hydrochemistry and isotopes (δ15N-$NO3-$, δ18O-$NO3-$ and δ15N-$NH4+$) methods. The results show that from upstream to downstream, the influences of human activties on the mass concentrations of Cl-, $NH4+$-N, $NO3-$-N, DIN (Dissolved Inorganic Nitrogen) are gradually prominent. The concentrations of $NH4+$-N and DIN in the wet season are higher than those in the dry season, mainly due to the the more intensive influence of exogenous input than the combined effect of rainfall and upstream water dilution. In the composition distribution of dissolved total nitrogen, $NH4+$-N and $NO3-$-N are the main forms in the wet and dry season respectively, indicating significant impact of human activities in the wet season. There is a strong positive correlation between $NH4+$-N and Cl- concentration in the wet season, indicating that $NH4+$-N and Cl- may have similar or the same sources in the wet season. Results of ion ratio of Na/Cl and stable isotope tracing are highly consistent. This indicates that upstream farmland chemical fertilizer, soil organic nitrogen and aquaculture sewage are the main sources of nitrogen in the upstream, while the soil organic nitrogen and urban sewage are the main sources of nitrogen in the downstream. The research results can provide data support and theoretical basis for river water environment protection and water resources management in the study area.