What is the metaphor of a heavy sunset on the earth?

It is a metaphor for the preciousness and importance of the elderly or their old age. This is a poem written by Li Shangyin, a poet in the Tang Dynasty. This poem means that the sunny dusk is also cherished by the world, which is a metaphor for the preciousness and importance of the elderly or their later years. This poem expresses the praise and cherish of old age, and implies that people cherish every moment, especially in old age, and know how to appreciate and enjoy life better. It can also be used to describe those who have experienced ups and downs and finally ushered in peace and beauty in their later years. Since Li Shangyin became Wang Maoyuan's son-in-law for three years, he has fallen into the narrow valley of party struggle and has been feared and excluded by the Niu Party. Xuanzong succeeded to the throne, and the Niu Party dominated the state affairs. The situation was even worse, so I had to leave Chang 'an and follow Zheng Ya to Guilin as a staff officer. Zheng Ya believes in himself. He can feel the warmth and coldness in the curtains. At the same time, leaving Chang 'an, the vortex of party struggle, can temporarily avoid being constantly looked down upon by the Cattle Party, which is also a kind of spiritual liberation. This poem was written against this background.