The origin of Mojiang purple rice is Pu 'er City, Yunnan Province. Purple glutinous rice is a specialty of Mojiang County, Pu 'er City, Yunnan Province. Mojiang purple rice, known as the best rice, "longevity rice", "medicinal rice", "world rice king", "moon rice" and "blood-enriching rice", belongs to glutinous rice, commonly known as purple pearl. Mojiang purple rice is big and full, with strong viscosity. After steaming, it can make the broken rice resume and has the effect of bone-setting. Compendium of Materia Medica states that purple rice has the functions of nourishing yin and tonifying kidney, strengthening spleen and warming liver, improving eyesight and promoting blood circulation, enriching blood and benefiting qi, closing uterus and nourishing yin, and treating neurasthenia. Since Emperor Wu of the Han Dynasty, emperors of all dynasties have listed purple rice as a tribute, which has become a delicacy for the royal family.