Which literati in ancient China wrote poems when they were young? What poem was written?

Bai Juyi was smart since childhood and studied very hard. After reading it, his mouth was sour and his hands were worn out. Young, all white hair.

Bai Juyi wrote at the age of sixteen:

Fu De Gu Caoyuan Farewell

The long grass is so lush that the withered grass will thicken the color of the grass every autumn and winter.

Wildfire can't burn it out, but the spring breeze can revive it.

Weeds and wild flowers are all over the ancient road, and the end of the grass in the sun is your journey.

I once again sent my bosom friend, and the thick grass represented my deep affection.