Describe how time flies. Sentences where people and things have changed.

Concentrate on reading, I know that spring has passed, and every inch of time is as precious as an inch of gold.

It is not Taoism that mocks, but the teachings of Duke Zhou are devoted to the study of Confucius.

Time flies.

It is almost as difficult for friends to meet each other as the stars in the morning and evening. Tonight is a rare event, and this lamp is candlelight. Two men who were young not long ago are now gray at the temples. It shocked us to find that half of our friends had died, which made us sad. We didn't expect that it would be twenty years before I could come to see you again. You weren't married when I left, but now these boys and girls are together. ...

-Du Fu's "To Wei Ba Chu Shi" This is absolutely wonderful.

Flowers must be folded straight, don't wait until there are no flowers. -Li Qingzhao