science

Qimin Yaoshu

Qimin Yaoshu 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 Qimin Yaoshu rather than just read about it. In short: The Qimin Yaoshu (Chinese: 齊民要術), translated as the "Essential Techniques for the Welfare of the People", is the most completely preserved of the ancient Chinese agricultural texts. It was written by the Northern Wei Dynasty official Jia Sixie (賈思勰), a native of Shouguang, Shandong province, which is a major agricultural producing region.

Key takeaways

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

Reference excerpt

The Qimin Yaoshu (Chinese: 齊民要術), translated as the "Essential Techniques for the Welfare of the People", is the most completely preserved of the ancient Chinese agricultural texts. It was written by the Northern Wei Dynasty official Jia Sixie (賈思勰), a native of Shouguang, Shandong province, which is a major agricultural producing region. The book is believed to have been completed in the second year of Wu Ding of Eastern Wei, 544 CE, while another account gives the completion between 533 and 544 CE. The text of the book is divided into ten volumes and 92 chapters, and records 1500-year-old Chinese agronomy, horticulture, afforestation, sericulture, animal husbandry, veterinary medicine, breeding, brewing, cooking, storage, as well as remedies for barren land. The book quoted nearly 200 ancient sources including the Yiwu Zhi. Important agricultural books such as Fàn Shèngzhī shū (氾勝之書) and Sì mín yuè lìng (四民月令) from the Han and Jin Dynasties respectively are now lost, so future generations can only understand the operation of agriculture at the time from this book. 280 recipes are found in the text. Since the publication of the book, historical Chinese governments have long attached great importance to it. Since the book spread overseas it has also often been considered a classic text to study changes in species. When Charles Darwin was researching the theory of evolution he made reference, in his book On The Origin of Species, to an "Encyclopedia of Ancient China". The book he referenced was in fact Qímín yàoshù. The book's name "Qímín yàoshù" can be explained as "techniques by which common people make their livelihood", but can also be explained as "techniques to harness the people's livelihood".

References

Illustrations

Qimin Yaoshu: A Ming dynasty printed edition — A Ming dynasty printed edition

Worked examples

Example 1 — a first encounter with Qimin Yaoshu

Start with the simplest possible case. Write down what Qimin Yaoshu 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 Qimin Yaoshu 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 Qimin Yaoshu 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 Qimin Yaoshu

In research: Qimin Yaoshu 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 Qimin Yaoshu 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: Qimin Yaoshu is common in secondary-school and first-year university syllabi. It links to neighbouring topics 6th-century Chinese books, Agriculture books, Agriculture in China, so understanding it makes those chapters shorter.
In everyday life: Look for Qimin Yaoshu 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Qimin Yaoshu” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Qimin Yaoshu in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Qimin Yaoshu 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 Qimin Yaoshu out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Qimin Yaoshu in simple terms?

Why does Qimin Yaoshu 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 Qimin Yaoshu?

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 Qimin Yaoshu.