Meaning: It expresses the sadness and regret for the past and present decline of the country.
Source "The Book of Songs: Millet Li" contains the sentence "The Millet Li Li", which means that the officials of the Eastern Zhou Dynasty passed by the old capital of the Western Zhou Dynasty and saw millet growing over them, and lamented the destruction of the palaces and ancestral temples. Later, "Mi Li" was often used to express the sadness and sadness of the country's past prosperity and present decline.
For example: "Deng Luoyang Ancient City" by Xu Hun of the Tang Dynasty
The grains and millet are half separated by the wild wormwood. How could the people of the past work in this city?
The sound of water goes to the east and the city changes, and the mountains rise to the north and the palace is high.
The crows are noisy, the evening clouds return to the ancient battlements, and the wild geese are lost in the cold rain in the empty trenches.
Poor Fairy Gouling Deng, she still plays her sheng and gets drunk with peach.