In ancient times, ignorance probably ranged from a few years old to a few years old.

The school age is about three to six years old. In ancient times, children were "enlightened" and the age of receiving education was generally around four years old. There is also a view that four years old is the best age for children to learn Chinese characters. The basic goal of the elementary education is to cultivate children's reading and writing ability, form good daily habits and have basic moral and ethical norms; And master some basic culture and common sense of daily life in China. It is equivalent to kindergarten or elementary school.

The traditional textbooks of Mongolian studies in China mainly include Three Amethyst, Hundred Family Names, Thousand-character Works, Youxue Qionglin and so on. There are narrow sense and broad sense in academic circles. In a broad sense, it refers to the ancient enlightenment education, including its educational system, teaching methods and teaching materials. In a narrow sense, it refers to enlightenment textbooks, that is, children's books.