The peony is a valuable flower in China. During the Qin and Han dynasties, people began to call it "tree peony." During the Western Zhou Dynasty, the peony first entered poetry and appeared in "The Book of Odes," the earliest collection of Chinese poetry, which has a history of over 3,000 years. In China's long history of peony culture, the peony has been given the spiritual connotation of wealth, auspiciousness and prosperity, and it is a symbol of the national spirit.