Indeed, that doesn't make sense.
If she were indeed Yu Yaolan's biological daughter, then she would also have to be Yan Feiming's biological daughter. Why would Yan Feiming be giving money to Lü Mei instead of taking his daughter back?
Following this train of thought, Jiang Yue speculated, "Is it possible that Yan Feiming and Lü Mei had some kind of relationship, and that Yu Xiao is also his biological daughter?"
Upon hearing this, Qin Zi felt as if he'd been struck by a sudden enlightenment and was completely stunned.