I haven't finished the first and second books, but they are both very good. The second one is Dihua, and the third one seems a little bit sharp. It's been a long time since I read it, and I kind of forgot about it. The fourth one is definitely a bit sharp, but it's okay.
I'm obviously in a book shortage, so I posted a post trying to find any good books. After so long, I recommended the most books myself. The first one is really good. He may have a little bit of a knife, but not much.