Yi people are mainly distributed in Yunnan, Guizhou, Sichuan and Guangxi. The ancestors of the Yi people can be traced back to the ancient frontier ethnic groups. In the process of going south, the ancient Qiang people merged with the indigenous tribes in southwest China to form the later Yi people.

Yi people have their own traditional writing-Yi language, which is called Yi language, Zhang Shu and Yi language in China historical records, while Yi people call its writing "Buma", "Nie" and "Nice". "Yunnan Tongzhi" records that "there were people with hidden pain and Malone people at the beginning, whose characters were like tadpoles, posthumous title was a book, and Yi people regarded it as the ancestor of the book".

Yi language is a syllable with phonetic notation. Structurally, it has some strokes such as horizontal, vertical, left, arc, circle and curve, so although it looks like Chinese characters in form, it is actually a kind of self-created text. In Yunnan, Guizhou, Guangxi and other places, Yi language is generally written vertically from left to right, while in Liangshan, Sichuan, Yi language is generally written horizontally from right to left. Especially the symbols used in Yi language are particularly interesting. At the beginning of each paragraph, flowers and birds are often painted. These models have no uniform rules, but are based on the author's personal interests. At the end of each article, a tree, an animal's head or a temple is usually drawn to indicate the end of this paragraph.

Yi literature is generally written on paper, cloth or sheepskin with a brush or bamboo pen, and a few are carved on bamboo tubes, bamboo sticks or cattle and sheep bones with a knife. At present, the traditional Yi language is still popular in some Yi areas such as Yunnan and Guizhou.

I hope it can help you solve the problem.