红颜红着红着就黄了蓝颜蓝着蓝着就绿了
[hóng yán hóng zhe hóng zhe jiù huáng le lán yán lán zhe lán zhe jiù lǜ le]
A unique phrase playing with colors as idiomatic representations, roughly suggesting over time, the bloom of 'red cheeks/beauty (usually used to describe female beauty)' fades (from bright red to yellow indicating aging or decline) whereas 'blue face/guys' (could imply men or lovers) turns 'green' (can denote envy, change, or inexperience), encapsulating the changeability in both appearances and relationships over time.