science

Li Daoyuan

Li Daoyuan 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 Li Daoyuan rather than just read about it. In short: Li Daoyuan (simplified Chinese: 郦道元; traditional Chinese: 酈道元; pinyin: Lì Dàoyuán; 466 or 472 in Zhuo County, Hebei – 527) was a Chinese geographer, politician, and writer during the Northern Wei dynasty. He is known as the author of the Commentary on the Water Classic (Shuijingzhu), a monumental work on China's geography in ancient times.

Key takeaways

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

Reference excerpt

Li Daoyuan (simplified Chinese: 郦道元; traditional Chinese: 酈道元; pinyin: Lì Dàoyuán; 466 or 472 in Zhuo County, Hebei – 527) was a Chinese geographer, politician, and writer during the Northern Wei dynasty. He is known as the author of the Commentary on the Water Classic (Shuijingzhu), a monumental work on China's geography in ancient times. Li used his position as an official with business in different places to carry field investigations. He is known to have visited the area belonging to the present-day Henan, Shandong, Shanxi, and Jiangsu provinces. Another source for his knowledge was the study of ancient geographical books he had access to, like the Classic of Mountains and Seas (Shanhaijing) completed by the time of the early Western Han dynasty and the Water Classic (Shuijing), written by Sang Qin during the Three Kingdoms period and later commentated on by Jin dynasty writer Guo Pu. Li vastly expanded the Water Classic, doing his own research and fieldwork. The original Water Classic has not survived but covered 127 rivers and streams and contained about 10,000 characters; Li's Commentary on the Water Classic discusses 1252 watercourses and contains about 300,000 characters in total. The book maps and describes the rivers and streams along with the history, geography and culture of the surrounding region.

References

Worked examples

Example 1 — a first encounter with Li Daoyuan

Start with the simplest possible case. Write down what Li Daoyuan 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 Li Daoyuan 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 Li Daoyuan 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 Li Daoyuan

In research: Li Daoyuan 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 Li Daoyuan 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: Li Daoyuan is common in secondary-school and first-year university syllabi. It links to neighbouring topics 527 deaths, 5th-century births, 6th-century Chinese writers, so understanding it makes those chapters shorter.
In everyday life: Look for Li Daoyuan 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 Li Daoyuan in 20 minutes

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

Frequently asked questions

What is Li Daoyuan in simple terms?

Why does Li Daoyuan 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 Li Daoyuan?

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 Li Daoyuan.