The crisp sound of a lock being picked echoed from outside, the door creaked open, but the person who entered surprised Su Qingyu.,And Cheng Ruijin was still holding a two-year-old child by the hand. She had never seen this child before, and Cheng Ruijin was unmarried as well.,"Besides being the daughter of a marquis's household, what makes you superior to me If not for my family background holding me back, how could I possibly lose to you"。