The original metaphor of "One who is close to Zhu is red": Being close to good people can make people good, and being close to bad people can make people bad. The objective environment has a great influence on people.
The hero and heroine of the story happen to be one named Zhu and the other Chi. It is fate that the two of them meet and get to know each other. It depends on who has a stronger magnetic field and who will influence the other!