What does the yellow spring mean?

Yellow water kills yellow water and saves poor yellow water. Specifically, Geng Dingkun is dying, and B and C must first prevent flooding. A and B are worried about the middle, and Xin Renshui is afraid to do it. It means standing upright, water flowing out of Kun, committing necromancy, and so on. But there are also: Xin entered the Million Village Palace, where Gui returned to Huan, Yi Liu rafters, and Ding Kun was always fragrant. This mainly depends on the specific environment and the direction and mode of water flow. It's a long story here