Xu Shen

Xu Shen (c. 58–147 CE) was a Chinese scholar of the Eastern Han dynasty who combined philology, calligraphy and public administration. He is remembered above all for the Shuowen Jiezi, the first comprehensive dictionary of Chinese characters, and for arranging its entries under radicals.

He was born in the Zhaoling district of Run'an prefecture, in what is now Luohe in Henan. He studied under Jia Kui, a respected official and scholar, and under his guidance became a recognised authority on the Five Classics. That reputation helped him win posts at prefectural level and eventually a position in the imperial library. Long before the dictionary, he was already a prolific writer; one early work, a commentary on the Huainanzi, survives only in name.

His outlook was shaped by the bitter rivalry between the Old Text and New Text schools of Confucianism, whose editions of the classics often disagreed over the form of a single character and, with it, over legal interpretation. Xu concluded that only a careful study of how each character had developed could settle such disputes. The result was the Shuowen Jiezi, completed in 100 CE and presented to Emperor An in 121, according to the usual account through his son.

The dictionary contains over 9,000 entries in small seal script, arranged in fifteen chapters, and it sorted characters into six categories. Xu held that compound characters could only be understood through their components. Some of his etymologies have been corrected by later research on earlier scripts, yet the work remains an essential source. Commentaries accumulated over the centuries, and the Qing scholar Duan Yucai produced the annotated edition still widely consulted. His lasting contribution is to have given Chinese philology the foundation on which much later study of the script was built.