On June 27, a local rainstorm and heavy rain occurred in the section between the first stage station in the Dayingjiang river upstream of Dapein I hydropower station and Dapein I HPP. The daily accumulated rainfall in the area where the Dayingjiang first stage station is located reached 206mm, and the maximum inflow of Dapein I HPP reached 2100m 3/ s. Yunnan United Company gave full play to the advantages of Yingjiang centralized control center and on-site duty of the power station, prepared in advance and responded efficiently, ensured the safety of personnel and flood control, and successfully responded to the largest flood since the flood season.