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Open the tool →日中则昃,月满则亏 (rì zhōng zé zè , yuè mǎn zé kuī) is a Chinese idiom (chengyu) meaning “Things tend to decline or reverse once they reach their peak or full maturity; when at its height, something will start to wane”.
日中则昃,月满则亏 is pronounced rì zhōng zé zè , yuè mǎn zé kuī in Mandarin Chinese.
Literally, 日中则昃,月满则亏 means “the sun at noon begins to decline, the moon at its fullest begins to wane”. It is used to mean “Things tend to decline or reverse once they reach their peak or full maturity; when at its height, something will start to wane”.
太阳到了正午就要偏西,月亮盈满就要亏缺。比喻事物发展到一定程度,就会向相反的方向转化。