What is the previous sentence of "When a crane flies over the clouds in a clear sky, it brings poetry to the blue sky"

Since ancient times, autumn has been sad and lonely. I say that autumn is better than spring.

A crane flies above the clouds in a clear sky, bringing poetry to the blue sky.

From the Tang Dynasty poet Liu Yuxi's "Two Autumn Poems·Part 1"

Translation

Since ancient times, poets and poets have lamented the depression of autumn, but I say that autumn is far away. Far better than spring.

On an autumn day, the sky is clear and a crane flies up through the clouds, which triggers my poetry to fly into the sky.

"Two Autumn Poems" is a collection of poems by Liu Yuxi, a poet of the Tang Dynasty. The valuable thing about these two poems is that the poets have unique feelings about autumn and autumn colors. They go against the tradition of literati lamenting autumn in the past and praise the beauty of autumn. They also use the description of yellow cranes soaring into the sky to express the author's enterprising pride and enthusiasm. Open-minded and optimistic feelings.

Creative background

This poem was written when the poet was demoted to Sima Langzhou. In 805 AD (the first year of Yongzhen), Shunzong ascended the throne and appointed Wang Shuwen to reform the government. Liu Yuxi also participated in this reform movement. However, the innovation encountered strong opposition from eunuchs, vassal towns, and bureaucratic forces, and ended in failure. Shunzong was forced to abdicate, Wang Shuwen was granted death, and Liu Yuxi was demoted. What is valuable is that the poet did not become depressed after suffering a serious blow. Liu Yuxi was thirty-four years old when he was demoted to Langzhou (Changde, Hunan). Just when he was feeling proud of the spring breeze, he was kicked out of the court. One can imagine his depression. But he has a strong desire for differences and wants to be different in everything he does, and refuses to follow what others say. "Two Autumn Poems" was written in this mood when he was demoted to Langzhou.