Is Chuchen related to Xia Youqiaomu Yawang Paradise?

It doesn’t matter.

It’s just that the author interspersed the story of Li Chuyao and Shan Dan’s brother Shan Yian in “Xia Mu” just to advertise through “Xia Mu”.

I haven’t watched "Chuchen" either, but didn't Ziyue recommend "Chuchen" at the end of "Natsuki 3"? In fact, the intersection of the two books is propaganda.

But maybe the author will also add some content about "Xiamu" to "Early Morning", which is definitely not much, and "Xiamu" has already ended, the protagonists are all dead, and there is nothing left to talk about.