人不犯二非少年
[rén bù fàn èr fēi shăo nián]
Similarly, 'Rén bù fàn èr fēi shàonián', translating to 'Without acting silly occasionally, one has not truly been young' encapsulates the youthful folly - expressing carefree, reckless yet vibrant period of youth often filled with fun, laughter, and sometimes mischievous activities.