Jiang Yun, also known as turmeric, is a specialty and an important export product in Luoping, Yunnan. It has a breeding history of more than 300 years in Luoping. The history of planting turmeric in Luoping can be traced back to the Ming Dynasty. It is a characteristic agricultural product with a long history in Luoping, and is known as the "hometown of ginger". By the Qing dynasty, it had become a tribute to the court and became royal ginger.

Luoping, Yunnan, is located at 27 degrees north latitude, in the southeast of the East Yunnan Plateau, and in the upper reaches of the Pearl River system, with complex topographic structure and great altitude difference. It has the characteristics of plateau stereoscopic climate and plateau monsoon climate, with warm climate, abundant rainfall and sandy soil, which is very suitable for planting Dioscorea zingiberensis. The annual average temperature is 15. The temperature is 65438 0℃ and the frost-free period is 250 days, which ensures the warm growth of turmeric which can not tolerate low temperature; The average sunshine hours per year is 1685 hours, which is beneficial to improve the quality of turmeric. The annual rainfall 1700 mm and the annual average relative humidity of 85% provide sufficient water for Dioscorea zingiberensis. The soil is loose and fertile, rich in organic matter and strong in water and fertility, which provides sufficient nutrients for Dioscorea zingiberensis.

Dioscorea Luoping is mostly planted in mountainous areas and plains at an altitude of 1, 200- 1, 600 meters. The soil species are rich and diverse, the ecological environment is well protected, and the growing environment is rarely polluted. It has become one of the rare original ecological "Alpine Ginger" in the world, and has been certified as an organic food in China, a national ecological origin protection product and a national geographical indication protection product.

In addition to the unique growth environment, the unique planting method of Dioscorea zingiberensis in Luoping is also a rare main factor: Dioscorea zingiberensis, like Panax notoginseng in Yunnan, is planted in rotation. After planting turmeric, each land should rest for at least three years to restore the land to its original state. Once every three years, the yield is limited, so Dioscorea zingiberensis is also called: eating limited resources.

Modern medical research shows that the contents of gingerol and curcumin, the core substances (components) of Dioscorea zingiberensis, rank first in China, which is three times that of ordinary ginger. It has extremely high health care value and is a real health care product with homology of medicine and food.