ake Xiao Zheng seriously, but Yu Xiaokang treated Xiao Zheng very warmly. He invited Xiao Zheng to his home for dinner several times, saying that he hadn't studied well and only reached high school. H...he others did come up with quite a few methods for interrogating Luo Caigang. 。For example, they deliberately left the door of the interrogation room where Luo Caigang was being held open. They broug...