1. State Grid Chongqing Electric Power Company, Chongqing, China
2. Chongqing Electric Power Company Scientific Research Institute, Yubei, Chongqing, China
3. Bishan Power Supply Bureau of State Grid Chongqing Electric Power Company, Bishan, Chongqing, China
4. State Grid Chongqing South Shore Power Supply Bureau, Nanan, Chongqing, China