C174 What Is the Purpose

"There's a barrier outside." Hua Bin jumped off the stool and said, "The door is very easy to open, but I don't know who set up the barrier, and for what purpose it is set up here."

Hua Bin's words caused the atmosphere to fall into silence. Chen Shuang took out two talismans and pasted them on the two doors. Those two doors didn't have any reaction.

Hua Bin roughly understood what he meant