Blood glutinous rice is a kind of rice with purple seed coat, which is called blood glutinous rice because of its waxy quality. After the natural blood glutinous rice is soaked in warm water, because the red pigment in the seed coat is slowly dissolved by the aqueous solution, a purple-red aqueous solution will gradually appear, and the red color will become thicker and thicker as time goes by. After cooking, the red seed coat will be separated from the embryo (rice grain). Fake blood glutinous rice is made of inferior rice and dyed with purple pigment. The most obvious difference is that after soaking in water, the water quality turns red faster than the genuine blood glutinous rice. After washing several times, the original shape of white rice will be revealed, and the red seed coat will not appear after cooking.

Purple rice is a kind of rice, named after the slender purple rice grains. The production of purple rice in Mojiang area has a long history. There are two kinds of purple rice: inner ultraviolet white, not waxy, and inner and outer purple. Purple rice is fragrant, oily and soft. Purple rice has high nutritional value and medicinal value, and has many functions such as enriching blood, invigorating spleen, regulating middle energizer and treating neurasthenia. Purple rice is more precious because of its various advantages and low yield. Kunming grain store and local local specialty store have small packages of Mojiang purple rice.