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       The active ingredients of the Vinca alkaloids are extracted from the oleander plant periwinkle, and the suitable temperature for the growth of periwinkle is 25-38 ℃, so Hainan Island of China is the advantaged growth area of periwinkle.

       At present, the company has cooperated with farmers in Qiongzhong, Wenchang, Ledong and other places to collect and plant Changchun flower on a large scale, and has formed a stable supply chain of Changchun flower. On this basis, the cooperation of Changchun flower planting also promoted the employment of farmers, helped increase the income of farmers, and significantly improved the local economic and social benefits.