Let's backtrack to the time before Yu regulated the rivers and watercourses, when the Human Tribe was afflicted by an even more terrible flood for the second time. Caught off guard without any preparation, they naturally suffered a great loss.
Such a catastrophe definitely shocked the Holy Land of the Human Tribe, but the martial arts and immortal cultivators were helpless against natural disasters. They could only report it to the Human Ancestors, hoping that they would have a solution.
When he found out, Suiren-Shi immediately summoned Youchao-Shi, Ziyi-Shi, Cangjie, Fuxi, the God Farmer, Xuanyuan, Zhuanxu, Emperor Ku, and Emperor Yao. Since Musen was still in his Closed Door Meditation, saying he had some enlightenment, he didn't bother him. After all, he couldn't ask for Musen's help for every little thing.