The famous poems lamenting how time flies are:

1. What is the geometry of life? Die like a morning glow. When there is no weight, China is not in the sun. -Lu Ji's "Short Songs"

Translation: How many years does a person live? Gone like the rosy clouds in the morning. Time will not come back, and the flower will not reopen within a year. He is old.

2. If the young don't work hard, the old will be sad. -Han Yuefu

Translation: If young people don't work hard in time, they will only regret for life when they get old.

3. Tomorrow will be another day, and there are so many tomorrows. I will wait for tomorrow and everything will be wasted. -Wen Jia

Translation: Tomorrow is another tomorrow, how many tomorrows there are. I have been waiting for tomorrow all my life, and nothing has progressed.

4. Don't be idle. It's sad to be a teenager. -Yue Fei's "Man Jiang Hong"

Translation: Don't waste your time, the teenager's black hair is gray, and you only regret it alone.

5. Nothing in the world makes people old. It's half a crow and half a horseshoe. -Wang Jiuling's

Translation: Think about the lingering shadow of my hometown in my dream. I have wasted half my life, but now I am still wandering. The poet can't help but sigh: Half of the things that make people old in this world are chickens crowing and half are horseshoes!