science

Ke Mu San

Ke Mu San 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 Ke Mu San rather than just read about it. In short: Ke Mu San (Chinese: 科目三; pinyin: Kē Mù Sān), also known as subject number three dance is an internet phenomenon originating in China. Believed to have originated from a wedding dance in Guangxi, the dance involves performers executing a series of hand movements, including quick twisting movements of the wrists while swinging their knees to the side, in sync with the folk song "一笑江湖" (pinyin: Yī Xiào Jiāng Hú; lit. '…

Key takeaways

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

Reference excerpt

Ke Mu San (Chinese: 科目三; pinyin: Kē Mù Sān), also known as subject number three dance is an internet phenomenon originating in China. Believed to have originated from a wedding dance in Guangxi, the dance involves performers executing a series of hand movements, including quick twisting movements of the wrists while swinging their knees to the side, in sync with the folk song "一笑江湖" (pinyin: Yī Xiào Jiāng Hú; lit. 'One Smile Jianghu') as sung by Wen Ren Ting Shu (simplified Chinese: 闻人听書; traditional Chinese: 聞人聽書; pinyin: Wén Rén Tīng Shū). Gaining mainstream attention, restaurant chain Haidilao added the dance to their menu in November 2023.

Origin Believed to have originated from Zhu Kaihong, a Guangxi native, who first performed the dance to entertain the guests at his friend's wedding reception following the boredom of the marriage ceremony. Another netizen posted his own version of the dance on Douyin shortly after passing the subject 3 of his driving test, and the dance, after he was interrogated, was called Ke Mu San (transl. Subject three). The dance went viral on Douyin and other Chinese social media as it was set to the folk song "一笑江湖" (pinyin: Yī Xiào Jiāng Hú; lit. 'One Smile Jianghu') as sung by Wen Ren Ting Shu (simplified Chinese: 闻人听書; traditional Chinese: 聞人聽書; pinyin: Wén Rén Tīng Shū). The viral dance drew a cultural phenomenon, which according to Shanghai Daily, suggests the three experiences of a native Guangxi person: singing folk songs as Subject One, slurping rice noodles as Subject Two, and dancing as Subject Three.

Reception Two influencers on Douyin posted a video of themselves dancing to Ke Mu San while wearing Haidilao uniforms. The video received nearly three million likes. On 31 December 2023, a Guinness World Record for the highest number of people dancing Ke Mu San both online and offline was set by a group of a few hundred people in Shenyang. In January 2024, at an event held at the Chinese Embassy in the United States, Ke Mu San was also performed by Chinese and American youths dressed in traditional Chinese clothes.

Controversy Following the introduction of Ke Mu San in Haidilao outlets, there were concerns over the disturbance to diners and staff welfare. In an incident at an outlet in Huai'an, Jiangsu, China, two diners argued over the noise from the dance, ending in police intervention. In addition, some employees reported feeling stressed over learning the dance when they were "so busy". On 15 January 2024, following an announcement by the Taiwanese Ningxia Night Market Facebook, that a Ke Mu San dance contest will be held 10 days later, there was a backlash claiming the dance as "Chinese unification by dance". In response, the night market apologized, stating that their original intention was to bring young people together "through music, dance and food in a healthy and interesting manner". However, they added that the contest would still proceed. In response to the backlash, spokesperson for the Taiwan Affairs Office Chen Binghua said that the behaviour was "Anti-China to the point of anti-intellectualism".

Notes

References

Worked examples

Example 1 — a first encounter with Ke Mu San

Start with the simplest possible case. Write down what Ke Mu San 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 Ke Mu San 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 Ke Mu San 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 Ke Mu San

In research: Ke Mu San 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 Ke Mu San 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: Ke Mu San is common in secondary-school and first-year university syllabi. It links to neighbouring topics Dances of China, Internet culture, so understanding it makes those chapters shorter.
In everyday life: Look for Ke Mu San 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 Ke Mu San in 20 minutes

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

Frequently asked questions

What is Ke Mu San in simple terms?

Why does Ke Mu San 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 Ke Mu San?

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 Ke Mu San.