The brush test in grade five in Shanghai uses regular script, regular script and a font of Chinese characters, also called regular script, regular script, real script and official script. It gradually evolved from official script, becoming more simplified and more horizontal and vertical. The book Ci Hai is interpreted as "square in shape and straight in brushwork, which can be used as a model". This kind of Chinese character has the correct font and is a modern popular handwritten orthographic Chinese character.