Pile up soil to form a mountain, and accumulate water to form a sea
jī shuǐ wéi shān, jī shuǐ wéi hǎi
Explanation: Pile up the soil to form a mountain, and store water to form a mountain. It can rise up into the sea. Metaphorically, a little makes a lot.
Source: "Xunzi·Ruxiao": "Accumulate soil to become a mountain, accumulate water to become a sea.
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Structured compound sentence idiom
Used as object and attributive; used in written language