tā cháng cháng tí xǐng nián qīng rén qīng chūn bù zài / bú yào bǎ shí jiān làng fèi zài wú yì yì de shì qing shàng他常常提醒年轻人青春不再，不要把时间浪费在无意义的事情上。He often reminds young people that youth will not return and not to waste time on meaningless things.