mathematics

Xue Long 2

Xue Long 2 is a mathematics 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 Xue Long 2 rather than just read about it. In short: Xue Long 2 (simplified Chinese: 雪龙2; traditional Chinese: 雪龍2; pinyin: Xuě Lóng 2; lit. 'Snow Dragon 2') is a Chinese icebreaking research vessel that entered service in 2019. She follows the naming of Xue Long, China's first polar research vessel.

Key takeaways

Xue Long 2 belongs to mathematics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Xue Long 2 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Xue Long 2 from memory before moving on to harder problems.

Reference excerpt

Xue Long 2 (simplified Chinese: 雪龙2; traditional Chinese: 雪龍2; pinyin: Xuě Lóng 2; lit. 'Snow Dragon 2') is a Chinese icebreaking research vessel that entered service in 2019. She follows the naming of Xue Long, China's first polar research vessel.

History The 5 million euro design contract for China's first domestically-built polar research vessel was signed in 2012 with the Finnish engineering company Aker Arctic, though construction did not begin until December 2016. She was built at Jiangnan Shipyard. Xue Long 2 now in service both as a supply vessel for China's research facilities in the Arctic and Antarctic regions and as a research vessel, with capabilities for geological and biological experimentation and surveying. On July 25, 2025, the U.S. Coast Guard spotted Xue Long 2 about 290 nautical miles north of Utqiagvik, Alaska, 130 nautical miles inside the U.S.'s extended continental shelf.

Design Xue Long 2 measures 122.5 metres (402 ft) long, with a beam of 22.3 metres (73 ft) and a draft of 8.3 metres (27 ft) at full load. She has a displacement of 14,300 tonnes. She has a diesel-electric propulsion system, with two 8-cylinder and two 12-cylinder engines, both Wärtsilä 32-series designs, powering two 7.5 MW Azipod propulsion units that give her a speed of up to 15 knots (28 km/h; 17 mph) in open water and 3 knots (5.6 km/h; 3.5 mph) when breaking 1.5-metre (4.9 ft) ice. Her ice class is Polar Class 3 and she is able to break ice while traveling either ahead or astern.

References

Illustrations

Worked examples

Example 1 — a first encounter with Xue Long 2

Start with the simplest possible case. Write down what Xue Long 2 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In mathematics, 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 Xue Long 2 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 Xue Long 2 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 Xue Long 2

In research: Xue Long 2 appears in mathematics 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 Xue Long 2 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: Xue Long 2 is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2018 ships, IMO numbers, Icebreakers of China, so understanding it makes those chapters shorter.
In everyday life: Look for Xue Long 2 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 Xue Long 2 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Xue Long 2 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 Xue Long 2 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Xue Long 2 in simple terms?

Why does Xue Long 2 matter?

Because it connects several mathematics 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 Xue Long 2?

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 Xue Long 2.