許慎做過太尉府祭酒，師從經學大師賈逵。佢用咗21年寫成《說文解字》，歸納咗漢字540個部首。
Xu Shen did the sacrificial wine of the Taiwei Mansion and studied under the master Jia Kui. It took him 21 years to write Shuowen Jie Zi, which summarized 540 radicals of Chinese characters.