According to Baidu Encyclopedia, Li Tiansheng, the chairman of China Railway 12 Bureau, belongs to the main hall class, because Li Tiansheng is also the party secretary of China Railway 12th Bureau Group Co., Ltd., and the township party secretary is the main hall class. The president of the university and the secretary of the Party Committee are both leading cadres at the department level.
China Railway 12th Bureau Group Co., Ltd. is a wholly-owned subsidiary of China Railway Construction Co., Ltd., which has the general contracting right of railway engineering and housing construction.