Wang Guoqiang, former Party chief of Fengcheng City in northeast China's Liaoning Province, on Monday returned to China from the United States and turned himself in to the discipline authority.

Wang Guoqiang, center, arrives at the Beijing Capital Airport on Dec 22, 2014. [Photo/ CCDI website]

This is one of the key cases currently being handled by a high-ranking anti-corruption office in its quest to repatriate suspects and return stolen assets to the state in the country's wider anti-corruption drive. Both China and the United States acknowledged that this was an important case, according to the Communist Party of China (CPC) Central Commission for Discipline Inspection.

Wang fled in 2012 and returned following the joint efforts of various central departments and local authorities. The United States also provided support to the Chinese authority, according to the commission.

Wang gave himself up along with a confession statement.

The investigation will continue.