“…In addition, according to relevant research, water pollution is also affected by factors such as industrial structure, urban greening, environmental governance, population size, FDI factors, and innovation foundations. These factors are represented by the proportion of the secondary industry in GDP, the green coverage rate of built-up areas, the comprehensive utilization rate of general industrial solid waste, the total population at the end of the year, the amount of foreign capital actually used in the year, the number of mobile phone users at the end of the year, and the income of postal services [ 100 , 101 , 102 , 103 , 104 , 105 , 106 , 107 ]. The specific calculation process is as follows:…”