1743-1796) published the Erya Zhengyi (????, "Correct Meanings of the Erya") and the naturalist Hao Yixing ??? wrote the (1808-1822) Erya yishu (????, "Subcommentary on Meanings of the Erya").

In the history of Chinese lexicography, nearly all dictionaries were collated by graphic systems of character radicals, which were first introduced in the Shuowen Jiezi. However, a few notable exceptions,