Qin Chong was her biological father. Qin Ran thought that her heart had long died, but she, who knew the truth, still felt her heart ache at this moment. Even if he didn't like Xing Li, she was still his biological daughter. He actually did this to pave the way for Qin Xue.
When Mo Chi saw that her expression was not right, he quickly added, "Actually, Qin Chong was only involved in part of it. He only knew that you had been sold." The word "sold" seemed to be describing a commodity. However, the Qin Ran who had been exchanged by the human traffickers back then could only be described as sold.