If young people don't work hard, old people will be sad.

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

Flowers will reopen one day and people will no longer be young.

Hard-working people are good at hard work, players are poor, actors think, hard-working people are destroyed, players are poor, actors think and followers are destroyed.

I don't know how to study hard early, but I regret learning late.

Jade must be cut to make a tool.

My life is limited, but so is my knowledge.