This poem was from the Tang Dynasty poet Bai Juyi's "Fu De Gu Yuan Cao Farewell." The whole poem was as follows: The grass on the plain withers and thrives once a year. The wildfire never ends, and the spring breeze blows, it grows again. The far-off fragrance encroaches on the ancient road, the clear green connecting the deserted city. And send the king's grandson away, full of parting feelings. The wind blows the fallen leaves and leaves fall to protect the flowers. the wild paths are all black with clouds, and the boat's fire on the river is only bright. In the morning I see the red and wet place where the flowers are heavy in the city of Jinguan. In winter we know pine and cypress trees, and in adversity we see true love. This poem depicted the process of the plants in nature growing and withering through the cycle of spring, summer, autumn, and winter. The phrase " when the leaves fall, they protect the flowers " meant that the leaves would protect the flowers because they provided nutrients and shelter the flowers from the wind and rain. This sentence could also be interpreted as the mutual dependence of all things in nature, whether they grow or wither, expressing the harmonious symbiosis between man and nature.