Cui Ruijun is under investigation by the Shanxi Provincial Supervision Commission.

The director of the Eighth Division of the Shanxi Bureau of the State Administration of Work Safety, Cui Ruijun, is suspected of serious violations and is currently under investigation by the Shanxi Provincial Supervisory Commission for his involvement in the "522" particularly serious gas explosion accident at the Lushenyu Coal Industry Co., Ltd. under Tongzhou Group.