# 夜郎自大

yè láng zì dà

Be absurdly self-important through ignorance

## Meaning & wording

**Literally:** Yelang thinks itself great

**Register:** Critical · conversational

[Perspective](https://chinese-idioms.yudis.dev/idioms/topics/perspective)

## When to use it

Use to criticize inflated self-importance based on a narrow view of the world.

It is a strong insult and should not be confused with healthy confidence.

## Understanding the expression

The idiom contrasts a small or limited frame of knowledge with an exaggerated claim to greatness. Modern use criticizes arrogance that comes from not understanding the wider field. It often concerns someone who overestimates their importance or ability without making a fair comparison. A person can take pride in real achievements without fitting this label. The criticism should identify the unrealistic claim and the missing perspective.

## Examples

只赢了一次比赛就看不起所有对手，未免夜郎自大。

### Traditional Chinese

只贏了一次比賽就看不起所有對手，未免夜郎自大。

zhī yíng le yí cì bǐ sài jiù kàn bù qǐ suǒ yǒu duì shǒu ， wèi miǎn yè láng zì dà 。

Winning one match and then looking down on every opponent shows absurd arrogance.

公司不能夜郎自大，以为自己没有竞争者。

### Traditional Chinese

公司不能夜郎自大，以為自己沒有競爭者。

gōng sī bù néng yè láng zì dà ， yǐ wéi zì jǐ méi yǒu jìng zhēng zhě 。

The company must not arrogantly imagine that it has no competitors.

多了解行业情况，就不容易夜郎自大。

### Traditional Chinese

多瞭解行業情況，就不容易夜郎自大。

duō liǎo jiě háng yè qíng kuàng ， jiù bù róng yì yè láng zì dà 。

Knowing more about the industry helps prevent inflated self-importance.

他批评那篇报告夜郎自大，完全忽视了别人的成果。

### Traditional Chinese

他批評那篇報告夜郎自大，完全忽視了別人的成果。

tā pī píng nà piān bào gào yè láng zì dà ， wán quán hū shì le bié rén de chéng guǒ 。

He criticized the report for arrogance because it ignored everyone else's achievements.

## Sources & reference checks

Original explanations and examples from Chinese Idioms Almanac. Source-checked October 6, 2026.

- [CC-CEDICT · forms & pronunciation](https://www.mdbg.net/chinese/dictionary?page=worddict&wdqb=%E5%A4%9C%E9%83%8E%E8%87%AA%E5%A4%A7)

- [Ministry of Education · 成語典](https://dict.idioms.moe.edu.tw/idiomView.jsp?ID=29&webMd=1&la=0)

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