In I Do, Sun Honglei becomes a gentle and considerate family man. He not only drives Li Bingbing to and from work every day, but also cooks delicious food for sex in person, coaxing the children to become better, trying to become the dream lover of countless women with the image of "home". After playing this family-oriented good man, Sun was favored. "The audience finally saw my true side." In life, Sun Ai went shopping with his girlfriend, boasting that self-evaluation "made people feel safe". Speaking of Yang Nianhua in I Do, Sun bluntly said when analyzing the role: "Yang Nianhua is a very responsible person and has restored my life very well."

In the film, Sun can be called the "ambassador of love", because he deeply regrets that he and his ex-wife have no children, so whenever he has time, he will volunteer in a nursery for disabled children, and stay for two or three hours. Sun, a big man, also has a little man's side. In addition to giving gifts, he will patiently tell stories to his children until they fall asleep sweetly. Like his father, he covered them with quilts and pulled Li Bingbing aside to cry. In this regard, Li Bingbing also said with emotion: "I didn't expect Hong Lei's brother, who is usually careless, to have such a gentle side, which really makes every girl love him enough!"

In the film, Tang Weiwei, who was experimented by Li Bingbing, won his admiration, while Li Bingbing was a white-collar worker with relatively high income. In order to seek true love, Sun hid his value and drove in Chang 'an to pursue Li Bingbing. In this film, Sun is a very meticulous person. He cooks for Li Bingbing and tries to create romance.

Give Li Bingbing care and care, and conquer Li Bingbing's heart with his gentlemanly behavior and meticulous care. In addition, Sun is a particularly caring person in the film. He volunteered to go to the orphanage to take care of the children. Sun is also humorous, which can be seen everywhere in movies.