沧海桑田此间少年
[cāng hăi sāng tián cĭ jiān shăo nián]
'Changes as vast as sea into mulberry fields, but here stands the youth' captures both the impermanence and change over time as well as an enduring aspect of youth. This evokes feelings about aging and transformation, yet the presence of youth continues to stand out against these changes, indicating resilience and the timeless spirit of youth facing the relentless passage of time.