if the young don't work hard, the old will be sad.

the health of heaven makes a gentleman constantly strive for self-improvement.

don't be idle, it's white and sad for a teenager.

Aspiring is not high, but empty ambition is long.

black hair doesn't know how to study early, but white head regrets studying late.

It's a long way to go, and I'll go up and down.

where there is a will, there is a way.

when the sword is sharpened, the plum blossom fragrance comes from bitter cold.