Classical Chinese? This is a famous saying. This is the night when the lights are turned on at five o'clock. That is, when a person is studying, he doesn't know whether he is diligent or not, and his white hair regrets being late. -Yan Zhenqing Time is an inch of gold, but time is an inch of gold. It is difficult for a teenager to learn to be old, and an inch of time should not be underestimated. -Zhu My life is limited, but so is my knowledge. -Zhuangzi Young people will be sad if they don't work hard. -"Long Songs"