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Xu Shen

Xu Shen is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Xu Shen rather than just read about it. In short: Xu Shen (c. 58 – c. 148 CE) was a Chinese calligrapher, philologist, politician, and writer of the Eastern Han dynasty (25–189 CE). During his own lifetime, Xu was recognized as a preeminent scholar of the Five Classics.

Xu Shen — main illustration
Xu Shen — illustration

Key takeaways

  • Xu Shen belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Xu Shen to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Xu Shen from memory before moving on to harder problems.

Reference excerpt

Xu Shen (c. 58 – c. 148 CE) was a Chinese calligrapher, philologist, politician, and writer of the Eastern Han dynasty (25–189 CE). During his own lifetime, Xu was recognized as a preeminent scholar of the Five Classics. He was the author of Shuowen Jiezi, which was the first comprehensive dictionary of Chinese characters, as well as the first to organize entries by radical. This work continues to provide scholars with information on the development and historical usage of Chinese characters. Xu Shen completed his first draft in 100 CE but, waited until 121 CE before having his son present the work to the Emperor An of Han.

Life Xu was born about 58 CE in the Zhaoling district of Run'an prefecture (modern Luohe in Henan). He was a student of the scholar-official Jia Kui 賈逵 (30–101 CE). Under Jia, he established himself as a master in his own right and enjoyed a positive reputation. This education allowed him to hold several government offices at the prefecture level, and ultimately rise to a post in the royal library. Before undertaking the Shuowen, he was already a prolific writer. Although lost, one of his better known early works was a commentary on the Huainanzi, an important sociopolitical work from the second century BCE. Xu Shen's life and work were shaped by the fierce division between Old Text and New Text schools of Confucian thought. These rival camps grew out of the wide proliferation of Confucian texts, which was brought on by the Emperor Wu of Han's elevation Confucianism to the state philosophy. Because knowledge of the Confucian canon was the primary qualification for government office, there was a large upswing in the rate of copying. These new additions were written in a standardized Han dynasty script. During the reign of Emperor Cheng of Han (r. 33 – 7 BCE), however, older manuscripts were discovered in the imperial archives and in the walls of Confucius's family mansion. These older texts were written in a pre-Qin, small seal script (xiaozhuan 小篆). Importantly, they also differed in their content and organization. A group of scholars, which came to be called the Old Text school, emerged and advocated for the use of this more ancient version. The New Text school meanwhile preferred the more recent versions. Since Han jurisprudence was based on the classics, the interpretation of even a single character could lead to concrete differences in legal opinions. The great variation in interpretations greatly troubled Xu. He was familiar with both schools: Jia Kui was a respected Old Text scholar, but Xu's official work required familiarity with the New Text editions. In an attempt to eliminate discrepancies between interpretations, Xu authored Different Meanings of the Five Classics (五經異義), a commentary, now lost, that incorporated interpretations from both the New and Old Text schools. Xu picked the readings that were best to his mind, regardless of school. Ultimately though, Xu decided that only a rigorous work on the development and history of each character could standardize the interpretation of the classics.

The Shuowen Jiezi

Xu Shen's desire to create an exhaustive reference work resulted in the Shuowen Jiezi (說文解字). The Shuowen has no standard English translation, and is sometimes rendered: "Explain the Graphs and Unravel the Written Words" or "Explaining Graphs and Analyzing Characters." The uniting principle behind each part of the massive project was, as Xu Shen writes in his postface, "to establish defined categories, [to] correct mistaken concepts, for the benefit of scholars and true interpretation of the spirit of language." Intended to be a comprehensive work, it encompasses 15 chapters and over 9,000 small seal script entries, and has a preface and a postface. Xu intentionally listed headwords in pre-Qin characters in order to provide their earliest possible forms, and thereby allow the most faithful interpretation. It is among the first character dictionaries which examined the evolution of characters in detail, and streamlined the "six category" approach to analyzing Chinese writing. It also created a system of 540 semantically organized radicals.

Linguistic theory In the postface, Xu gives a brief account of the history of writing. According to legend, Chinese characters were first invented by Cangjie, who was inspired by footprints to create a system of signs that refer to the natural world. These original graphs could then be combined to make meaningful characters with referents distinct from their component graphs. This was important for Xu Shen, who emphasized the productivity, even fertility, of Chinese writing. Despite the novel meanings of compound characters, Xu Shen believed that true understanding of composite characters was contingent on an understanding of their components. Providing clear explanation of these relationships lay at the heart of his motivation. Central to Xu Shen's thought is the contrast between wen (文 patterns) and zi (字 characters), indeed these contrasting categories of graphs receive separate mention in the work's title. Even today, there is disagreement over the exact definitions of the two terms. The Song dynasty scholar Zheng Qiao (鄭樵) first presented the interpretation that wen and zi are the difference between non-compound and compound characters. More recently, other scholars, such as Françoise Bottéro (2002), have argued that the addition of a specifically phonetic element (and thus not simply compounding) marks the principal difference between wen and zi. From this original binary contrast, Xu Shen formally delineated for the first time the six categories (六書) of Chinese characters.

… excerpt ends here. Continue reading the full article.

Illustrations

Xu Shen illustration
Xu Shen: A page from a 17th century copy of a Northern Song dynasty edition of the Shuowen Jiezi
A page from a 17th century copy of a Northern Song dynasty edition of the Shuowen Jiezi
Xu Shen: A leaf from the Shuowen Jiezi. The large character on the upper left is written in the ancient Zhou form.
A leaf from the Shuowen Jiezi. The large character on the upper left is written in the ancient Zhou form.

Worked examples

Example 1 — a first encounter with Xu Shen

Start with the simplest possible case. Write down what Xu Shen claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Xu Shen before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Xu Shen ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Xu Shen

In research
Xu Shen appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Xu Shen in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Xu Shen is common in secondary-school and first-year university syllabi. It links to neighbouring topics 147 deaths, 1st-century Chinese calligraphers, 1st-century Chinese writers, so understanding it makes those chapters shorter.
In everyday life
Look for Xu Shen outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Xu Shen in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Xu Shen means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Xu Shen out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Xu Shen in simple terms?

Xu Shen (c. 58 – c. 148 CE) was a Chinese calligrapher, philologist, politician, and writer of the Eastern Han dynasty (25–189 CE). During his own lifetime, Xu was recognized as a preeminent scholar of the Five Classics.

Why does Xu Shen matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Xu Shen?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Xu Shen.

Tags

  • 147 deaths
  • 1st-century Chinese calligraphers
  • 1st-century Chinese writers
  • 2nd-century Chinese calligraphers
  • 2nd-century Chinese writers
  • 58 births
  • Ancient linguists
  • Chinese lexicographers
  • Chinese philologists
  • Han dynasty government officials
  • Politicians from Luohe
  • Writers from Luohe

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