science

Kuodi Zhi

Kuodi Zhi 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 Kuodi Zhi rather than just read about it. In short: Kuodi Zhi (Chinese: 括地志), usually translated as Comprehensive Gazetteer or Description Encompassing the Earth, is an early Tang dynasty survey of Tang China's geography and administrative divisions. It was compiled by Li Tai, Prince of Wei, a son of Emperor Taizong, with the help of imperial scholars including Xiao Deyan (萧德言).

Key takeaways

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

Reference excerpt

Kuodi Zhi (Chinese: 括地志), usually translated as Comprehensive Gazetteer or Description Encompassing the Earth, is an early Tang dynasty survey of Tang China's geography and administrative divisions. It was compiled by Li Tai, Prince of Wei, a son of Emperor Taizong, with the help of imperial scholars including Xiao Deyan (萧德言). It was completed in 641/642 AD. The original work comprised 555 volumes, with 550 volumes of text and 5 volumes of preface, but most have been lost. During the Qing dynasty, scholar Sun Xingyan (孙星衍) published the 8-volume book Kuodi Zhi jiben (括地志辑本), a collection of the surviving fragments. In 1974, Wang Hui (王恢) published a revised and expanded version of Sun's work entitled Kuodi Zhi xinji (括地志新辑). In 1980, He Cijun (贺次君) published Kuodi Zhi jijiao (括地志辑校).

See also Yuanhe Maps and Records of Prefectures and Counties

References

Worked examples

Example 1 — a first encounter with Kuodi Zhi

Start with the simplest possible case. Write down what Kuodi Zhi 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 Kuodi Zhi 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 Kuodi Zhi 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 Kuodi Zhi

In research: Kuodi Zhi 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 Kuodi Zhi 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: Kuodi Zhi is common in secondary-school and first-year university syllabi. It links to neighbouring topics 7th-century Chinese books, Gazetteers, Historical geography of China, so understanding it makes those chapters shorter.
In everyday life: Look for Kuodi Zhi 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 Kuodi Zhi in 20 minutes

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

Frequently asked questions

What is Kuodi Zhi in simple terms?

Why does Kuodi Zhi 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 Kuodi Zhi?

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 Kuodi Zhi.