In which year did the battle for six waters control begin?

According to relevant information, the tough battle of "six waters governing together" began in 2022. On June 4th, 2022, Hainan held the mobilization meeting of the province's "Six Rivers Co-governance", proposing to systematically promote the "Six Rivers Co-governance" of sewage treatment, water supply guarantee, flood control and drainage, water saving and excellent seawater. Therefore, in 2022, the tough battle of six waters co-governance began.