C90 Andersen's butterfly

Xu Hui took care of Zheng Die and gradually learned about Zheng Die's situation. However, Zheng Die did not tell Xu Hui most of the things, she only knew that Zheng Die used to live in the capital. As for why she came to the border, Zheng Die did not tell Xu Hui.

Xu Hui thought that they could be considered to be in privacy now