时光薄凉何来地久天长
[shí guāng bó liáng hé lái dì jiŭ tiān zhăng]
Cool and thin is the flow of time, hence everlasting love seems distant or hard to achieve. It laments the fleeting nature of time which makes long-lasting connections hard to maintain. Reflects doubt on lasting promises of love amidst the passing of time and changing circumstances.