## 4 Results and Analysis
### Comprehensive Level Measurement of Each System
After 2015, the overall growth rate is relatively fast, and there are also fluctuations in some provinces, but the amplitude of the fluctuations is not apparent. There are still specific gaps in the ecological environment development of various provinces and regions, and the gap is still widening. The gap between the highest and lowest regional ecological environment development levels widened from 0.208 in 2010 to 0.395 in 2018. The development level of scientific and technical innovation in coastal areas is observed to be comparatively lower than the development level of the ecological environment when both systems are considered together. Simultaneously, over the course of 11 years, there has been a discernible positive trajectory in the advancement of scientific and technological innovation, as well as in the development of ecological environments in coastal regions. Simultaneously, regions characterized by elevated levels of scientific and technical innovation exhibit superior levels of ecological environment development, exemplifying the reciprocal coupling interplay between these two systems. Analysis of the Level of Coupling and Coordination between Technological Innovation and Ecological Environment Development  
4.2.1. Analysis of the Temporal Evolution Trend of Coupling Coordination Degree  
The objective is to determine the connecting coordination degree between technological and scientific advancement and the ecological environment's development in coastal areas from 2010 to 2020 using Equations (6)-(8). Additionally, the coupling coordination degree between scientific and technical innovation and sustainable environment development in coastal areas will be calculated based on the existing classification standards for the coupling coordination degree. The presented data in this study pertain exclusively to the coupling coordination degree values and kinds seen in coastal areas for the years 2010, 2016, and 2020, as well as the corresponding 10-year average. This limitation is attributed to spatial constraints. The selection of 2016 as the median value for analysis can be attributedto the implementation of the country's \"Thirteenth Five-Year Plan\". The proposal put out by the Central Committee for the formulation of the 13 th Five-Year Plan for National Economic and Social Development has exerted a substantial influence on the domains of innovation in technology and the ecological environment. The aforementioned factor has significant consequences, as seen by the findings presented in Table 6.  
Overall, the coupling coordination degree of the two systems in coastal areas from 2010 to 2020 ranged from 0.191 to 0.611, and both coastal areas showed an increasing trend; at the same time, the number of provinces with a medium coupling coordination degree was more significant, accounting for 55%. The proportion of provinces with good coordination reached 36%, indicating that the level of coupled and coordinated development of the two systems in coastal areas is basically in the stage of moderate coupling and coordinated development. Specifically, in 2010, only Guangdong and Jiangsu were in the stage of good coupling and coordination. By 2020, the coupling coordination degrees of the two provinces reached 0.818 and 0.747, respectively, rising to the high-quality coupling coordination stage, indicating that Guangdong and Jiangsu provinces gradually became coastal areas for scientific and technological innovation cooperation. It is a \"marine benchmark\" for the coupling and coordination of ecological and environmental development; Hainan has always been in a low coupling coordination stage, with huge future development space and an urgent need for policy guidance.