Knock on the Happiness Door

Zili Huang successfully operates a heart implant surgery for a child and becomes a medical director. Zili Huang's wife is pregnant.

Zili Huang's wife gives birth, and it turns out that the baby is a mix. Zili Huang is shocked and can't believe his wife has an affair.

Zili Huang's wife wants to divorce. Zili Huang is arrested and wants Yan Fang to keep this between them.

Zili's wife thinks Zili is having an affair, and her dad faints after hearing this conversation. Zili's personal life starts damaging his career.

Zili encounters many challenges in his personal life, including having a fight with his colleague. This incident negatively affects his reputation at work.

Zili's wife makes a call to convince Junyi Wang to drop the lawsuit. Zili reveals the true identity of the baby.

Zili is suspended at work because someone reports Zili has something to do with medical malpractice and bribery.

Zili can't prove his innocence, and the situation is getting worse. Thus, he decides to leave the hospital.

Zili brings his wife home and takes good care of his wife's dad. After everything is settled, he leaves the house for good.

Zili and his wife are divorced. After 5 years, everything changed. Zili becomes a chef and lives his new life.

Zili reveals what the unethical doctor does to a patient, but the patient's family blames Zili for everything. He is taken to the police station and runs into Yan Fang.

Yan Fang visits Zili's due to her job duty. Yan Fang's boyfriend is coming back to tell her that he meets someone and wants to break up.

Ziqiang invites his brother Zili to a restaurant because he sets up a blind date for his brother. Yan Fang tries to call her boyfriend, but she has no luck.

Zili has a blind date with Manyu at the restaurant. Zili tells her that he is not a doctor anymore. Instead, he is now a salesman.

Yan Fang receives lots of bouquets. She thinks her boyfriend sends those bouquets, but it turns out this is not what she thinks it is.

Manyu and Zili are drinking in the villa. Yan Fang calls Zili for help, and Manyu picks up the phone. Manyu is jealous of Yan Fang.

Yan Fang officially breaks up with Chao Wei. Zili comes to see Chao Wei and is about to give a piece of his mind.

Yan Fang finds out who sends all the bouquets to the police station. Manyu offers Zili a manager position at her company.

Yan Fang is on a mission and disguises as a party girl in order to catch a criminal. Zili sees her and interrupts her work.

Zili's ex-wife is assigned to relocate because of her job. She asks Zili to take care of her son, Hemu Zhong, and her dad.

Zili is exhausted because he has lots of things on his plate: An old man, a kid, and his relationship.

A thief breaks in while Hemu is home alone. Yan Fang investigates the case and gives Zili a lesson.

Manyu encounters buggery, and Yan Fang helps her out. Zili is accused of bigamy and is arrested by Yan Fang.

A tragedy happened in the Zhong family, and the news is everywhere. Zili is in sorrow and disappears.