Follow the path forward. After a while, you will hear crying. The quest "Where Does the Crying Come From?" accepted in Figure 1 will be updated.
Continue forward and defeat the enemies ahead. There is a save point on the left. Pick up the Large Dust ahead (ignore the mechanism on the right for now).
Save your progress, turn around, and head back the way you came. This is a fork in the road; the left path is a dead end but contains books and quests, while the main path is on the right.
Defeat the enemies in the dead end on the left to obtain the book [Clues to Jianghu Mysteries #7: Blood Letter from the Thief "Slippery Hand"].
