According to the relevant data, Xiashan Reservoir 1974 burst its banks and favored Changyi. 1974 The flood was serious, and Xiashan Reservoir was faced with a burst of banks. The provincial party committee ordered Weifang to blast the dam in Changyi direction. Wei Jianyi, a Changyi native who was then secretary of Weifang prefectural party committee, couldn't bear the flood in his hometown and didn't order the dam to be blown up. Finally, the reservoir didn't embarrass the secretary, and the water opened the dam from another direction.