As far as the large brushwork system is concerned, it can be divided into three brushwork systems, one is "twisted printing", the other is "straight down" and the other is "square folding" of the tablet school.
The tracing back of brushwork stems from the changes of various writing tools, and it is difficult for us to determine an evolution time of specific brushwork. For example, the relationship between "knife" and "bone" in Oracle Bone Inscriptions; The relationship between "mold" and "casting" in bronze inscriptions. In addition to these, brushwork has a great relationship with the evolution of calligraphy. Seal characters and curves; Official script and square folding. All these have a decisive influence on the way of writing with a pen. Therefore, when we learn brushwork, we can't have a single, static concept and think that brushwork is an unchangeable technical law in writing.
A brushwork system can express a similar calligraphy style. Calligraphy creation is a process of promoting writing with the brush method, so we will think that the brush method is the core of writing and regard it as the only way to write. Pen system has the characteristics of pen system, and there is no so-called competition. What can be distinguished is the competition of pen control ability. In the traditional works of past dynasties, there are classics in various brushwork systems.