C1089
Although everyone had experienced the terror of the ointment, they felt it again when they saw Hangu take out the results of the interrogation at night.
It really wasn't a big deal. He could just hang it there and do whatever you asked him to do, what he said, and what you told him to do.
These people's goal was really similar to Chen Shouxin's guess, and it was actually the gunpowder formula