The ending was very good, every detail extremely beautiful, I think it was very well placed and poetic. It didn't disappoint me. In the end I think the drama is 8.5/10, it was very good to watch and I liked that they didn't focus on romance but on a tragic story with remarkable characters.
The bells part and the yichen and jiu arc were the most significant for me.
I think it was one of the best dramas this year and done very well. If you're looking for a story to get emotional, I recommend it.