Unless you're writing Zhao Yunlan in close enough third person (or intimate enough situation) that first only could do.

This is pretty much what I mean - when writing m/m you can't default to he/him all the time because there are two he/hims at least, lol, so when distinguishing who is doing what in any sentence, I might need to write at least one of their names out. I was just writing Yunlan from the beginning, instead of Zhao Yunlan because he is the POV character. "Yunlan walked across the room and picked up his coat" for example. Not so much "how do people greet each other / address each other" but much more simply, "how do I signify the POV character" .... writing "Shen Wei" seemed to flow very well but writing "Zhao Yunlan" constantly was getting tedious, both to write and to read.