Originally a vicious female supporting character, Ning Qingning was transformed into a vicious female supporting character by chance. With the belief that she did not want to be cannon fodder, she just wanted to fall in love. Why would she be hit by cigarette butts while walking, get hit by someone while riding a bike, and be surrounded by delinquent teenagers when she came home from school? If she didn't fall in love, why would she still face bankruptcy? The female supporting character really didn't do anything. The male protagonist came out to ask for an explanation.
Purpose: Who says that a female supporting character will always be a supporting female character? In our own stories, we are always the only protagonists.