Complex sentence: Xiaochun and Xiaoqian later visit Tiger and sell him the firearms they have stolen, and in return, Tiger allows them to work at his nightclub, but they leave the nightclub later after an unhappy incident.
Split into simpler sentences: Xiaochun and Xiaoqian visit Tiger and sell him the firearms they have stolen. In return, Tiger employs them to work at his nightclub, but they leave the nightclub later after an unhappy incident.