Is sinochem's four constructions formal?

Sinochem Sijian is a central enterprise. Sinochem Sijian is a Hunan central enterprise supervised by the State Council State-owned Assets Supervision and Administration Commission. China Chemical Fourth Construction Co., Ltd. was established in February 1985 1 1, and its business scope includes general contracting of construction, professional contracting of engineering business, project management and related technical and consulting services, three-level contracting of power facilities, three-level maintenance, three-level testing (above with qualification certificates), lifting machinery, boilers, etc.