Chen Ting came back to find Ling Xiao at a very opportune time, just before he graduated from high school, which meant that Ling Xiao was about to go to college and become an adult. On the one hand, you don't have to take care of it with you, it takes time and energy. On the other hand, this is the time when Ling Xiao needs money to help. Chen Ting's current economic situation can show its presence.
Extended data
Over the years, Chen Ting kept in touch with her mother, but she didn't entrust her mother to make up for her absence. The old lady's character is already obvious in the play. She is snobbish and greedy for petty advantages. She is not around for so many years, and there is no trouble with Ling Heping. It can be inferred that Chen Ting has always understood the living conditions of Ling Xiao and Ling Heping. She even knew that she was fostered in the Li family, and Ling Heping gave her living expenses every month.
If Chen Ting really cares about Ling Xiao and doesn't worry about his life, even if she doesn't want to come back for reunion, let her mother pass a message on her behalf and send a red envelope or gift to her children during the New Year or at school, at least it's a gift. But Chen Ting didn't do this until she suddenly returned to China. This detail shows that Lingxiao's position in Chen Ting's heart is actually just like that. She doesn't want Lingxiao to affect her present family.