There are four major schools of Chinese brush making techniques: Xuan brush, Hu brush, water brush, and Li Fushou brush. Yangzhou brushes (also known as "Yangzhou water brushes") are unique for their hemp base. According to the history of the Qing Dynasty, "Yangzhou's medium-tube mouse-heart brushes are excellent for ink and line drawing, and water brushes are also wonderful." Yangzhou brushes are made of wolf hair and rabbit tips (hair from rabbit backs) as the main raw materials, and local hemp as auxiliary materials. Most of the tools are homemade. Its production technique is very difficult, with more than 100 processes in three links: water basin, set, and dry farming. They are closely linked and rigorous. The key processes all depend on the artist's touch, tongue feel, and visual inspection. The thickness, length, age, and shape of the pen tip are all particular, and the craftsmanship is exquisite and full of charm. The learning system of Yangzhou brushes is passed down orally by the master, and the scholars practice and ponder repeatedly. It is difficult to get started, and it is even more difficult to master. Yangzhou brushes are durable and can hold water without leaking. The brush head and the pen holder complement each other. They are elegant, strong and graceful. The representative work "Xiangjiang Yipin" was once known as the "king of brushes".