Responses
The novel and donghua are structured differently as in the donghua, all the flashbacks occur chronologically in one go, whilst in the novel it's a bit more confusing, but if you understand the story, it shouldn't be too confusing. For the best reading experience, you should start from the beginning.

Can someone tell me what chapter of novel I can start after watching the donghua? I wanna read from the donghua season 2 ending - wy meet lz when he's 3y/o ╥﹏╥