1. In order to meet the needs of all walks of life, calligraphers are constantly exploring and innovating, trying to express their artistic ideas and aesthetic tastes with new writing styles and forms.
2. In the Qin Dynasty, official script became the font of official documents and the "style" of officials. Other writing forms are regarded as "vulgar style", including auxiliary style. As a new writing form, the auxiliary body has been widely spread and developed among the people because of the high esteem of official script in society at that time.
3. Due to the limitation of writing materials and tools, people need more labor-saving, simple and fast methods in the writing process, which also promotes the emergence and development of auxiliary bodies.
4. With the passage of time and the change of social, cultural and political environment, calligraphers' ideas and aesthetic concepts have also changed. They began to try to express their artistic ideas and aesthetic interests with new writing styles and forms, which also promoted the further development and evolution of the auxiliary body.