Teenagers only know how to play, but don't know how to study hard. When they are old, they regret why they didn't know how to study hard when they were young.

Don't be idle, it's white and sad.

When will all the rivers go to the East China Sea and return to the west? A lazy youth, a lousy age.

Time is money, but money is not time.

I advise you not to cherish noble Yi, and I advise you to cherish youth.

A year's plan lies in spring, and a day's plan lies in morning.