2. Hebei producing areas: Lixian, Rongcheng and Anping. The main cultivated varieties are Fengshan medicine (flower seed yam and water yam). The main purpose is to eat.
3. Henan origin: mainly produced in Jiaozuo and other places in Henan. Dioscorea opposita, also known as sweet potato and ginseng, is the highest in China. Many large domestic medicinal materials markets and pharmaceutical manufacturers have purchased or established designated planting bases in Jiaodian.