浅吟潮涨潮退细数花开月落
[qiăn yín cháo zhăng cháo tuì xì shù huā kāi yuè luò]
A highly literary expression that poetically depicts quietly recounting the passage of time and changes of the nature, like the rhythmic ebb and flow of the tide, blooming flowers, and waxing and waning moons. Used often to express reflection or nostalgia towards fleeting yet beautiful moments in life or relationships.