1. State Grid Hubei Electric Power Research Institute,Power Grid Technology Center,Wuhan,China
2. State Grid Wuhan Economic and Technological Development Zone Power Supply Company,Sales Department,Wuhan,China
3. State Grid Wuhan Electric Power Company,Electric Power Maintenance Department,Wuhan,China
4. Xianning Power Supply Company of State Grid Hubei Electric Power Company,Electric Power Maintenance Department,Xianning,China