Adaptations of books can be done well even if they don't follow every single detail--such as the phenomenal sucess of Goodbye My Princess (2019) based on the book Eastern Palace--but if a drama adaptation doesn't present some key information, it can be hard to understand.
If you've just finished the drama and are confused about the ending or other parts, here is a link to the epilogue translations from Jiuyun's POV--thanks to the people from soompi forums. I only read through the epilogue part, but I believe the same person who translated the epilogue also translated the ML/FL's goodbye scene and their reunion scene. (It should be on pages 9-11.)
https://forums.soompi.com/topic/433583-mainland-chinese-webdrama-2020-the-killing-of-three-thousands-crows-%E4%B8%89%E5%8D%83%E9%B8%A6%E6%9D%80/page/9/
I think this will help some people understand the depth of their fates and their star-crossed love more especially after seeing Jiuyun's POV.