In To Our Simple Beauty, why can Chen Xiaoxi resist ignoring Jiang Chen for three years?

Probably because she is really tired. She thought about Jiang Chen for so long. He wasn't there when she needed him badly, just like when she broke up: "I'm so tired."

Then, Jiang Chen called Xiaoxi at the airport. She actually went, but she couldn't find it at the airport … which made her feel that Jiang Chen really didn't love her.

Finally, the part of the TV series after Jiang Chen went to Beijing was cut. In the novel, Chen Xiaoxi still misses Jiang Chen very much, and pretends to inadvertently contact Jiang Chen through "mass New Year message". In fact, Chen Xiaoxi has been waiting for Jiang Chen to come back for three years …