What brush is used to write Weibei?

Hehe, personal preference. Just like Jin Nong, he cut off the tip of the brush and created a "lacquer book". It is best to write about Weibei with sheep hair, because the epigraphy of Weibei is strong, so it can be neutralized with a softer one, or written mildly. All the above are my humble opinions. I am from the Department of Shanyi Calligraphy. Please advise me.