C54 Tracing the Mastermind

It seems like Zheng Kai's shop was stolen by this person. However, since he didn't steal anything else but was directly sent to Zheng Kai's wine, it means that someone must have ordered this person to do so behind his back.

However, if he wanted to find out who the mastermind was, he would have to start from this person. Thus, Zheng Kai decided to capture this person first