Looking at the characters on ancient bamboo slips, we can see a style of official script.
Because the structure of bamboo slips is long, Chinese characters are written vertically on them. In order to write more, ensure that each bamboo slip can write more words, so that the shape of the official script font can ensure that the most words can be written.
Because the official script font shape is flat. But the earliest official script was written on bamboo slips.
The early period of official script was characterized by the balance of strokes. This is just the initial font style of an official script. This style is related to the use of bamboo slips. Later, after gradual evolution and calligrapher's design practice, it promoted the development and perfection of official script.
Li Shu in Qin Dynasty became a typical China font and writing method.