Because Wu Sheng was born in the countryside before, he returned to the countryside after graduating from college, worked in a cultural center, met Lingling's mother, and then had his own daughter. Lingling's mother was seriously ill and died when Lingling was three years old. Because of the difficulties in life, she adopted the child to Wu Sheng's cousin alone. Accord to that plot information display of the query related data,

1. The role comes from the 20th episode of TV series Marriage Clinic: Wu Sheng finally tells the truth he has been hiding in court, and Cai Lingling is his own daughter.

Lingling, the daughter of the countryside, went to town and was admitted to her father. On the one hand, Wu Sheng arranged for her to be a nanny in her own home in order to fulfill her father's responsibility. On the other hand, she was afraid that her wife Ye would know, so she lied to her that Lingling was her cousin's daughter.