What is Li Bai's poem about sadness?

But since the water is still flowing, although we cut it with our swords and raise our glasses to drown our sorrows.

Shu Yun, a farewell school book in Xielou, Xuanzhou.

Author: Appreciation of Li Bai in Tang Dynasty

Since yesterday, I have to leave Bolt and me behind.

It hurts my heart even more today.

Autumn geese are escorted by Changfeng, and I treat them in this villa and drink my wine.

The bones of great writers are all your brushes. In Tianyuan, I grew up beside you, Xiao Xie.

We are all lofty distant thoughts, longing for the sky and the bright moon.

But since the water is still flowing, although we cut it with our swords and raise our glasses to drown our sorrows.

Since the world can't satisfy our desire, I will loosen my hair and get on a fishing boat tomorrow.