The complex merger, which has been under discussion since at least 2017, would create the world's biggest industrial chemicals firm.

In a brief statement on its website, the State-owned Assets Supervision and Administration Commission (Sasac), under the State Council, said Sinochem and ChemChina would implement a "joint reorganisation."

Since 2018, both state-owned companies have been chaired by Ning Gaoning, who the following year insisted the merger was still on https://www.reuters.com/article/us-sinochem-chemchina-merger-idUSKBN1XG151 after reports China planned to abandon it due to challenges in bringing the management teams together.

In early 2020, Sinochem and ChemChina opted to consolidate their agricultural assets into a new holding company, ChemChina unit Syngenta said.

(Reporting by Colin Qian and Tom Daly, editing by Louise Heavens and Bernadette Baum)