## 4 Case Study
### Policy Suggestions  
1. The development level of city-industry integration is not only affected by a single factor. In the development of urbanization, we should pay attention to the comprehensive coordination of industry, city, residents, environment, and science. People are an intermediate bridge connecting industries and cities, and the development level of people's lives is an important measure of the quality of city-industry integration. Therefore, urbanization development should pay attention to increasing population welfare expenditure and improving the medical and health environment. At the same time, urbanization development should abandon the extensive industrial development mode with high pollution and high energy consumption and instead pay attention to the construction and protection of the urban ecological environment. The development concept of innovation, coordination, green, openness, and sharing is the  
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Year**} & **Overall** & **Inter-Regional** & **Intra-Regional** & **Chengdu Plain** & **South Sichuan** & **Northeast Sichuan** \\  & **Difference** & **Differences** & **Economic Zone** & **Economic Zone** & **Economic Zone** \\ \hline
2010 & 0.0047 & 0.0005 & 0.0042 & 0.0041 & 0.0000 & 0.0001 \\  & & (10.73\%) & (89.27\%) & (87.80\%) & (0.40\%) & (1.07\%) \\
2011 & 0.0052 & 0.0006 & 0.0046 & 0.0045 & 0.0001 & 0.0000 \\  & & (11.32\%) & (88.68\%) & (86.45\%) & (1.62\%) & (0.61\%) \\
2012 & 0.0067 & 0.0014 & 0.0053 & 0.0052 & 0.0000 & 0.0001 \\  & & (20.69\%) & (79.31\%) & (77.55\%) & (0.66\%) & (1.10\%) \\
2013 & 0.0065 & 0.0013 & 0.0051 & 0.0051 & 0.0000 & 0.0000 \\  & & (20.51\%) & (79.49\%) & (78.69\%) & (0.38\%) & (0.42\%) \\
2014 & 0.0053 & 0.0014 & 0.0039 & 0.0038 & 0.0000 & 0.0001 \\  & & (26.23\%) & (73.77\%) & (71.99\%) & (0.67\%) & (1.11\%) \\
2015 & 0.0061 & 0.0010 & 0.0050 & 0.0049 & 0.0001 & 0.0001 \\  & & (16.91\%) & (83.09\%) & (80.63\%) & (1.49\%) & (0.97\%) \\
2016 & 0.0074 & 0.0015 & 0.0060 & 0.0058 & 0.0001 & 0.0001 \\  & & (19.67\%) & (80.33\%) & (78.37\%) & (1.24\%) & (0.72\%) \\
2017 & 0.0072 & 0.0015 & 0.0057 & 0.0056 & 0.0001 & 0.0001 \\  & & (20.24\%) & (79.76\%) & (78.23\%) & (1.26\%) & (0.27\%) \\
2018 & 0.0052 & 0.0014 & 0.0038 & 0.0037 & 0.0001 & 0.0000 \\  & & (26.76\%) & (73.24\%) & (71.17\%) & (1.32\%) & (0.74\%) \\
2019 & 0.0052 & 0.0009 & 0.0044 & 0.0043 & 0.0001 & 0.0001 \\  & & (14.65\%) & (83.35\%) & (82.55\%) & (1.07\%) & (1.74\%) \\ \hline \hline \end{tabular}
\end{table}
Table 7: Theil index and structural decomposition of development of city–industry integration in each region.  
Figure 6: The evolution of the city–industry integration gap between economic zones.  
fundamental idea for promoting the high-quality development of new urbanization in an all-around way.
2. Given the imbalance of regional development, it is necessary for the government to fundamentally play a role in resource allocation and provide a fair development environment for different cities, strengthening regional cooperation, cultivating urban agglomeration and support, and coordinating cross-regional development in order to weaken the regional differences of city-industry integration development. We took intraregional cooperation as a breakthrough in the reduction of the imbalance within the Chengdu Plain Economic Zone. The South Sichuan Economic Zone will further build a multi-center urban agglomeration integrated innovation and development pilot zone to improve its strategic position. Moreover, the Northeast Sichuan Economic Zone will provide full play to its eco-tourism strengths for industrial transformation, improving the scientific and technological innovation ability of south Sichuan and northeast Sichuan economic zones, establishing a cross-regional coordinated development mechanism, and realizing sustainable development.