Another pig is captured. This time, it's Luozheng, who's at the bottom of the food chain. He's been caught in a trap set up by the inn's owner to trap cultivators at their innate level, which is lower than the master's. This trap is set up so that if a cultivator encounters an evil beast, the owner will just leave the captives to the beast's mercy. This is all part of an evil plan to trap and feed people at their natural level. The owner is all, "hey, this kid is so strong that he can break free of this trap!" The owner calms down and explains that the bamboo is called "purple thunder bamboo" because it has a special ability to grow underground for thousands of years at a time. This means that if they encounter an evil monster, they'll be left to the mercy of the beast. This explains why the owner is so worried about the pigs running away from the trap.