Jiuyin Zhen Jing Ji Ming Post guides the practice of geomantic omen and guides this. Why can't you pick it up? Do you still have it?

Go to the martial arts school to find a task, and then I want you to find Cao (a gossip). Go to the pub to buy rice wine, and then go to Xiang Junlun and ask him to drink rice wine. He will give you a wine list and then order him to give you a cave coordinate. There is a box in the cave, and there is a bronze key on the left side of the box (look carefully for the luminous place). Then go to the well and open it. The well of Jiming Post is at the fisherman's place.