不朽的少年有放肆的萌
[bù xiŭ de shăo nián yŏu fàng sì de méng]
'The immortal youth has unrestrained charm.' It suggests an everlasting youthful exuberance and uninhibited playfulness, emphasizing eternal vigor and freshness regardless of age. Often used by those cherishing youthful memories or wishing to keep a young spirit.