The company is subordinate to EHV transmission company, peak-shaving and frequency-modulation power generation company, Guangdong Power Grid Company, Guangxi Power Grid Company, Yunnan Power Grid Company, Guizhou Power Grid Company, Hainan Power Grid Company, Guangzhou Power Supply Bureau Co., Ltd., Shenzhen Power Supply Bureau Co., Ltd., China Southern Power Grid Finance Co., Ltd., China Southern Power Grid Research Institute, Dinghe Property Insurance Company, Ding Xin Information Technology Co., Ltd., China Southern Power Grid Energy Development Research Institute, China Southern Power Grid Materials Company, China Southern Power Grid Yunnan International Company, Guangzhou.