五湖四海 wǔhú-sìhǎi all parts of the country
How to remember 五湖四海: 五 five + 湖 lake + 四 four + 海 sea = all parts of the country.
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How it is used
- 'From all corners of the land' - people gathered from everywhere: 来自五湖四海的朋友 (láizì wǔhú-sìhǎi de péngyou) friends from all over.
- Emphasizes diverse origins coming together, often a warm, inclusive tone (unity despite different roots).
- A set idiom; don't parse it literally as specific lakes and seas.