I want to learn this kind of painting. What kind of painting is this? Sketch or ink painting or something?

Personally, I like ink painting, which is more artistic and antique, and watercolor is more realistic and modern, each with its own advantages. There used to be a lot of big ink paintings in the computer, but now I can't find them, only my own? = = ... Personally, I think ink painting is very simple and easy to use, so I'd better find a good teacher ~ I'll return the old watercolor painting. ...