Four people. According to official website, Changzhi Municipal People's Government and Changzhi Coal Supervision Bureau have four deputy directors: Jasmine Zhang, Hu Haijun, Song Aishan and Guo Xiang. The Changzhi Supervision Branch of Shanxi Coal Mine Safety Supervision Bureau was established in August 2000, which is mainly responsible for the safety supervision and law enforcement of 1 14 coal mines in the administrative area of Changzhi City, Shanxi Province.