How to write some fonts about brush details? Write back, click, etc.

Where is it clear here? It is best to search for some videos, which are very detailed and look vivid. For example, Hotan, if you search, there must be videos of their writing, especially tutorials. For another example, Yan Ruimin's brushes and pens are very good, and they are available online. Go ahead and search. It's only a few minutes.