Eating black rice is black rice day. The eighth day of the fourth lunar month is the traditional Nirvana Festival in China. According to folklore, Mulian, a disciple of Sakyamuni, tried to dye rice with southern candle leaves and cook it into black rice for his mother to eat. Hungry ghosts dare not eat it. Mother is finally full, and the people eat black rice every year to commemorate Manglietia's dutiful son. According to the new edition of Compendium of Materia Medica, candle leaves are the leaves of Vaccinium bracteatum, an Ericaceae plant.

She people celebrate the "Black Rice Festival". Every household cooks black rice, and the whole family eats a meal and gives it to relatives and friends. At the same time, they also gathered together to sing and dance to commemorate this festival. She people in Xiaocang Autonomous Township of Lianjiang County also celebrate Ubuntu Festival, and the mountain village is very lively on this day. Black rice is a wild plant called black barnyard grass, which is used by She people on the mountain. It is made by decocting leaves in soup, then soaking glutinous rice in the soup for several hours, picking it up and steaming it in a wooden steamer. This kind of black rice is blue-green, shiny black, soft to eat and delicious. Because of the anti-corrosion and spleen-opening effects of black rice, black rice is packed in ramie bags and hung in a ventilated and cool place for several days. If fried with lard, it will taste better. Therefore, there is a saying that "a family steamed ten incense".