In " Spring Beauty and Zhi Ming," the man showed his childish side to express his sincere feelings and commitment to the girl. In the movie, Zhiming showed an immature side when he was with Chun Jiao, such as often making impulsive decisions and speaking without thinking. However, behind these actions was his sincerity and love for Chun Jiao. He hoped that by showing his childish side, Chun Jiao would trust him more and rely on him to deepen their relationship. At the same time, childish behavior could also show a man's commitment and sense of responsibility to a girl. In a relationship, a man showing his childish side could also show that he was willing to make efforts and changes in order to be with the girl, such as keeping his promise, caring for the girl, and so on, so as to gain the girl's recognition and trust. Therefore, a man could show his sincere feelings and sense of responsibility to a girl by showing his childish side to express his approval and commitment to her. At the same time, he could also gain the girl's trust and love.