biology

Ren Shang

Ren Shang is a biology 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 Ren Shang rather than just read about it. In short: Ren Shang (Chinese: 任尚; Wade–Giles: Jen Shang; fl. 91 - died 118) was the Protector General of the Western Regions under Eastern Han between 102 and 106 CE. In February 91, he and Geng Kui defeated the unnamed Northern Shanyu shortly after the Battle of the Altai Mountains, on commission by Dou Xian.

Key takeaways

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

Reference excerpt

Ren Shang (Chinese: 任尚; Wade–Giles: Jen Shang; fl. 91 - died 118) was the Protector General of the Western Regions under Eastern Han between 102 and 106 CE. In February 91, he and Geng Kui defeated the unnamed Northern Shanyu shortly after the Battle of the Altai Mountains, on commission by Dou Xian. In 93, he killed the penultimate northern chanyu, Yuchujian Chanyu during a pursuit with Wang Fu. A Chinese inscription stele of him, the Achievements Inscription of Ren Shang of the Han (汉任尚纪功铭) was excavated in 1957 from Kumul, Xinjiang, which recorded the event in 93. When Ban Chao was retiring from the post of Protector General of the Western Regions in 102 CE due to age an ill health, Ren Shang asked him for some advice. Ban Chao said:

"The officers who are outside the Barrier are naturally not devoted sons and obedient grandsons. All have been deported for some misdeed and ordered to fill a post in the frontier military colonies. On the other hand, the barbarians have the emotions of wild birds and animals. It is difficult to foster their good tendencies and easy to destroy them. Now, you have an austere and strict character. Well, when a river is clear, it doesn’t have big fish. A government that is too meticulous doesn’t obtain the sympathy of its inferiors. You have to be flowing and accommodating, be indulgent with the little mistakes, and content yourself with guiding the hand of the principal generals. After (Ban) Chao left, (Ren) Shang said in private to his close friends: “I think that Lord Ban has some marvellous prescriptions, but what he said to me was very ordinary." In 107 CE, the Western Regions in modern Xinjiang province rebelled against Chinese rule. Ban Yong was appointed as a Major (Jun Sima 軍司馬) and, with his elder brother, Ban Xiong (班雄), went to Dunhuang to meet up with the Protector General of the Western Regions, Ren Shang, who had replaced Ban Chao as Protector General in 102 CE. The Chinese had to retreat and, following this, there were no Chinese functionaries in the Western Regions for more than ten years until Ban Yong returned in 126 CE. According to the Hou Hanshu (Chap. 117, p. 6b), Ren Shang was recalled and executed in 118 CE, for committing exactly the mistakes which Ban Chao had warned him against.

Notes

References Chavannes, Édouard (1906). Trois Généraux Chinois de la dynastie des Han Orientaux. Pan Tch'ao (32-102 p.C.); – son fils Pan Yong; – Leang K'in (112 p.C.). Chapitre LXXVII du Heou Han chou. T'oung pao 7. Hill, John E. (2009). Jade Gate to Rome: A Study of the Silk Routes during the Later Han Dynasty, First to Second Centuries CE. BookSurge. ISBN 978-1-4392-2134-1. (forthcoming)

Worked examples

Example 1 — a first encounter with Ren Shang

Start with the simplest possible case. Write down what Ren Shang claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, 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 Ren Shang 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 Ren Shang 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 Ren Shang

In research: Ren Shang appears in biology 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 Ren Shang 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: Ren Shang is common in secondary-school and first-year university syllabi. It links to neighbouring topics 118 deaths, 1st-century births, 2nd-century executions, so understanding it makes those chapters shorter.
In everyday life: Look for Ren Shang 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 Ren Shang in 20 minutes

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

Frequently asked questions

What is Ren Shang in simple terms?

Why does Ren Shang matter?

Because it connects several biology 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 Ren Shang?

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 Ren Shang.