C131 Mud-water ejection
"There is something inside this box. If you guys are going to the back mountain, I believe it will be useful. Open it in time. There is a message that I left behind, so it is not appropriate to open it at this time." The old Daoist even started to play tricks on him.
The fact that the old Daoist is so secretive makes us even more suspicious of what is inside.
However