Regular script is one of the main calligraphy styles in China, also known as regular script, regular script, regular script and regular script. Because it is square, it is named model. It came into being at the end of Han Dynasty and prevailed in Wei, Jin, Southern and Northern Dynasties. The Tang Dynasty was the golden age of regular script. Regular script is gradually degenerated from official script after a long period of development and evolution. The characteristics of regular script, on the whole, regular script is rectangular, the structure is closer than official script, and the pen is also very rich and delicate. Writing behavior is also more flexible and convenient than official script. Since its establishment, regular script has replaced the orthodox position of official script. After long-term trial, it is proved to be a script with good combination of practicality and artistry. It has been the official font adopted by the government for thousands of years, and it has also become a big one in the history of calligraphy. We often say "truth, grass, official script and seal script", and regular script is the first of the four.