Urgent! What does it mean to kill seven people in the water?

Seven kills are partial officials and are generally not suitable for public office.

Ding Chou, the water of happiness, loves Jinsheng most, avoiding the punishment of Xin Wei, Bing Chen and Bing Xu. Ding Chou and Yi You are weak water, while Yin is strong and Yang is weak. Those who are blessed by nature have a clear-cut stand, are more intelligent and less happy, and are noble and respected with the heroic spirit of Shui Mu.