Chrysanthemums bloom in full bloom, while dahlias bloom in succession in spring and summer. After summer, they bloom again, and wither when frost comes. Its flower shape is similar to that of the national peony. Its color is magnificent and colorful, which makes people like it. Dahlia is the national flower of Mexico, the provincial flower of Jilin Province, and the city flower of Zhangjiakou City, Hebei Province. The gorgeous Dahlia symbolizes generous, rich and auspicious.