What poem is cold food?

Cold Food is a four-line poem written by Hong, a poet in Tang Dynasty. The content of the whole poem is: the spring city is full of flowers, and the cold food is east wind and willows. As night fell, the palace was busy lighting candles, and smoke drifted to the house of the prince and the marquis.

The main idea of the whole poem is: In the late spring, the Liu Xufei in Chang 'an fell red, and the east wind blew the willow branches in the imperial garden at the Cold Food Festival. As night falls, the palace is busy handing out candles, and the light smoke of candles is scattered into the homes of princes and nobles. The first two sentences of this poem describe the scenery during the day, the charming spring scenery and the scenery of the whole court garden in Chang 'an. The last two sentences are about the night scene, which vividly draws a picture of candles at night, making people see the light of candles and smell the faint smoke. The whole poem is realistic by line drawing, depicting the royal style, full of intoxication of the spring scenery of the imperial capital and singing of Chengping in the prosperous times.