Why didn't the 15th Metallurgical Company merge into MCC?

MCC only retained high-quality assets after listing.

. China Tenth Five-Year Metallurgical Construction Group Co., Ltd. is a large state-owned construction enterprise with the special qualification of general contracting under China Nonferrous Mining Group Co., Ltd. directly under the State-owned Assets Supervision and Administration Commission of the State Council. The 15th Metallurgical Company was not merged into China Metallurgical Group because it was directly under the leadership of metallurgical department. After listing, MCC only retained high-quality assets, such as MCC CCID, MCC South and other large production enterprises.