I want to thank myself seven times

Although Ren Xiaosu had a gun with him, his location would immediately be identified if he fired a shot. In that case, the Qing Consortium's people behind him would all get attracted, and it would really be over for him once he got caught in between them and the Experimentals. Moreover, if the Experimentals attacked from a close distance, a gun would be of less use than a dagger.

He instinctively moved his hand to the dagger Yang Xiaojin had traded him for food. However, this action shocked Ren Xiaosu a great deal. The dagger was no longer there!

Ren Xiaosu started thinking back. When Yang Xiaojin split up with them, she had pretended to accidentally bump into him. The dagger was probably stolen away by her at that time.