Xi Jian sat in the car he gave to Ling Yue which was driven by Zou Ci. His hand touched the 'play' button. Under the driver's seat, like Zou Ci said, Xi Jian found a sophisticated recorder in thumb size stuck under the chair leather. If Zou Ci didn't told him, Xi Jian wouldn't find anything. He listened to every conversation recorded.
That man, Zou Ci, was indeed not an ordinary bodyguard. They knew each other since childhood. When Xi Jian was busy playing till his heart content, Zou Ci had already jumped into the dark world because of the environment he grew up in, but they were remained a good friends. Xi Jian contacted him again when he and Ling Yue were involved in an incident many years ago. That's when he offered Zou Ci a position as his bodyguard and decided to set foot in the same world as him. With assist from Zou Ci and their underling, Xi Jian in a short time could rule the underworld there.