Ran's aunt asked Qian Zheng to find Mo Xunxun, whimsically thinking that by finding Mo Xunxun and saying a few nice words, Mo Xunxun could help them, and maybe neither mother nor daughter would end up in jail.
Qian Zheng naturally had no intention of helping them escape, but since he was also involved in antiquities smuggling and theft, he worried that the mother and daughter might rat him out, so he pretended he would definitely help them and guaranteed he would find Mo Xunxun.
Qian Zheng got a photo of Mo Xunxun as a young girl from Ran's aunt, and, for his own protection, Qian Zheng thought that finding her might actually be more beneficial for him.
Therefore, Qian Zheng hired an expensive private detective to locate the person just within the small town, which wasn't too difficult.
Later, he learned their address, and the private detective subtly reminded him that Jian Yi was not someone to be trifled with, his background was extremely complex.
