The full name of Guodian Nanrui is Nanrui Group Co., Ltd. (State Grid Electric Power Research Institute Co., Ltd.), which is a scientific research and industrial unit directly under State Grid Corporation. State Grid Corporation is a central enterprise in China and a state-owned enterprise of the central government. Central enterprises refer to state-owned enterprises owned by the central government, and state-owned enterprises refer to state-owned enterprises. As Guodian Nanrui is a directly affiliated unit of State Grid Corporation of China, it belongs to both state-owned enterprises and central enterprises. Therefore, Guodian Nanrui is both a state-owned enterprise and a central enterprise.