中共中央党校
From July 1985 to April 2000, Mao worked in the China Nonferrous Metals Industry Corporation, a state-owned company under the jurisdiction of the State Council of the People's Republic of China. From April 2000 to April 2009, Mao worked as the chief executive of Western Mining Company, a large state-owned natural resources company. At the same times, Mao studied at Central Party School of the Communist Party of China, he also earned a doctor of engineering from Central South University.