1. Hebei Electric Power Design & Research Institute   2. Jilin Electric Power Survey & Design Institute 3. Shanghai Electric Power Design Institute Co., Ltd. 4. Fujian Electric Power Survey & Design Institute 5. Hubei Electric Power Survey & Design Institute 6. Henan Electric Power Survey & Design Institute 7. Sichuan Electric Power Design & Consulting Co., Ltd. 8.The Ningxia Hui Autonomous Region Electric Power Design Institute 9. Guizhou Electric Power Design & Research Institute 10. Hainan Electric Power Design & Research Institute 11. Jiangxi Electric Power Design Institute 12. Qinghai Electric Power Design Institute   1. Hebei First Electric Power Construction Engineering Company   2. Hebei No. 2 Electric Power Construction Engineering Company 3. SEPCO Electric Power Construction Corporation 4. SEPCO1 Electric Power Construction Corporation 5. Shandong Electric Power Construction No. 2 Company 6. SEPCO III Electric Power Construction Corporation 7. Jilin Electric Power Construction Company 8. Shanghai Electric Power Construction Co., Ltd. 9. Fujian Electric Power Construction Co., Ltd 10. Hubei First Electric Power Construction Engineering Company 11. Hydro Electric Power System Engineering Company   12. Hubei Hongyuan Power Engineering Co., Ltd.   13. Henan No. 1 Thermal Power Construction Company   14. Henan No. 2 Thermal Power Construction Co.   15. Jiangxi Thermal Power Construction Corp.   16. Jiangxi Hydropower Engineering Bureau   17. Sichuan No. 2 Electric Power Construction Company   18. Sichuan No. 3 Electric Power Construction Company   19. Chongqing Power Construction Corporation   20. Ningxia Electric Power Construction Company   21. Qinghai Thermal Power Construction Company   22. Guizhou No. 1 Electric Power Construction Company 23. Guizhou No. 2 Electric Power Construction Company   1. Hebei Electric Power Equipment Co., Ltd.   2. Shandong Electric Power Pipeline Engineering Company 3. Changchun Generating Equipment Group 4. Siping Power Line Hardware Works 5. Changchun Longyuan Electric Power Equipment Co., Ltd. 6. Shanghai Power Equipment Manufacture Co., Ltd. 7. Shanghai Electric Power Environmental Equipment Works Co., Ltd. 8. Wuhan Power Equipment Works 9. Wuhan Tower Works 10. Zhengzhou Power Equipment Works 11. Henan Electric Equipment Material Company   12. Jiangxi Electric Power Equipment Factory   13. Chengdu Power Machinery Works   14. Chengdu Steel Tower Manufactory   15. Chengdu Electrical Power Fittings Works   16. Dujiang Power Equipment Works   17. Hainan Power Equipment Factory 18.Hubei Electric Power Equipment Co.Ltd