Why does Kedong Power have two companies?

The types of responsibilities are different. According to official website of Kedong Power, the two companies under Kedong Power are divided into two subsidiaries due to different types of responsibilities. Beijing Kedong Electric Power Control System Co., Ltd. was established in 1995, which was jointly funded by China Northeast Electric Power Group Corporation and Electric Power Research Institute of the Ministry of Electric Power Industry (predecessor of China Electric Power Research Institute), with a registered capital of10.50 billion yuan.