On the day of Chigo's mother's operation, Xu Ying made an excuse to say that she was not feeling well and had to go home first. Tong Zhanlong sent her home, but she left her silk scarf in his car. When Tong Zhanlong sent it back, he saw Xu Ying driving out. He followed Xu Ying to the hospital. It turned out that Xu Ying came to see Chigo's mother. Tong Zhanlong saw Xu Ying and Chigo snuggling together and knew that she had been with Chigo. Tong Zhanlong didn't know that Xu Ying was a police undercover. He just felt that Xu Ying deliberately asked him for money.