“…Based on [58] and the different production stages, the following influence factors are selected: government support, urbanization level, industrial structure, energy consumption structure, scientific and technological progress, economic development level, and environmental regulation. Furthermore, following [59], the influence factors are set as explanatory variables, and the input resource redundancies are set as explained variables, when the regression part of the three-phase DEA model, namely the SFA model, is established. The government support, industrial structure, and urbanization level mainly affect eco-efficiency in the production stage, whereas technological progress, environmental regulation, and economic development mainly affect eco-efficiency during the process of pollution treatment.…”