Lin Xuelan only left Xingyao's courtyard so late because in this Prince's Mansion's backyard, she is currently most familiar with Xingyao.
Moreover, Lin Xuelan could see that Xingyao's ways of handling matters and social interactions were better than hers. To get by in the Prince's Mansion, it's necessary to interact more, look out for each other, and build closer relationships.
From Xingyao, she also learned about things she hadn't observed yet.
These girls in the backyard also form several small groups. The girls in these cliques are more intimate and familiar with each other than with the others.
And these girls in small groups often have some special connections.
For example, Xia Zhiqing and Xia Zhining are twin sisters.
Xiao Yunxi and Xiao Ya, on the other hand, are aunt and niece.
Xiao Yunxi and Chu Juan, Ning Wan and Liang Xue, the old relationships between them are even more...
