There are more than 30 species of Chrysanthemum, and 17 species are native to China, mainly including: Chrysanthemum indicum, Chrysanthemum morifolium, Chrysanthemum morifolium, Chrysanthemum morifolium, Chrysanthemum morifolium, etc. It is a perennial herb. I like cool, cold-resistant, the growth temperature is suitable18-21℃, the underground roots are drought-resistant, and waterlogging is the most taboo. I like loam with high terrain, deep soil layer, rich humus, loose and fertile and good drainage. It can grow in slightly acidic to slightly alkaline soil. And Ph6.2-6.7 is the best. As a short-day plant, it grows nutritionally under the long sunshine of 14.5 hours per day, and the darkness of 12 hours per day and the night temperature of 10℃ are suitable for flower bud development. As for chrysanthemums soaked in water in the world, there are two famous ones, namely, Florists Chrysanthemum and Chrysanthemum morifolium. The difference between them is that Chrysanthemum morifolium contains stevioside, amino acids, flavonoids and various vitamins and trace elements. Chinese medical research shows that Chrysanthemum morifolium has the functions of nourishing liver, improving eyesight, clearing heart fire, tonifying kidney, invigorating spleen and regulating stomach, moistening throat, promoting fluid production and regulating blood lipid. Drink this product often, it can warm in spring to remove dampness, quench thirst in summer, relieve dryness in autumn and clear fire in winter. "Florists Chrysanthemum" is an excellent variety bred from chrysanthemum population, which is native to Jinzhuling area of Shexian County, and has both ornamental value and medicinal function. According to folklore, "Florists Chrysanthemum" was originally introduced as an ornamental chrysanthemum by Huizhou merchants in Song Dynasty from Deqing County, Zhejiang Province. In a drought year, many people got red-eye headache, and some people used fresh chrysanthemums to soak the fire, which was very effective. In the future, people often make tea with dried flowers or chrysanthemums to cure diseases such as red eyes, shame and brightness, and modesty. Since then, chrysanthemums have been widely planted in front of and behind farmers' houses in this area, and dried chrysanthemums have been specially baked for a long time, so Jinzhuling is famous far and near. During the Guangxu period of the Qing Dynasty, red eye disease was also circulated in the Forbidden City in Beijing. The emperor ordered a visit to famous doctors and medicines, and the magistrate of Huangshan presented dried chrysanthemum in Huangshan. After soaking in the clothes, the Beijing people recovered from their eye diseases. So Huiju became famous and was honored as "Gongju". Gongju has always been regarded as an important Chinese herbal medicine.