This article suggests language regulation of Chinese textbooks should be stricter than others, it has three categorizations and four levels at least: correct, exact, valid, adequate.

• 中文教科书语言的规范要求更严格，它应包括三个范畴、四个层次：正确、准确（语言范畴），贴切（语体范畴），适度（应用范畴）。