Cereals generally refer to "japonica rice, adzuki bean, wheat, soybean and yellow rice", and Buddhism regards it as "barley, wheat, rice, adzuki bean and flax". Besides rice and flour, it is also called miscellaneous grains. Now, whole grains generally refer to all grains, oils and beans. The more diverse the varieties, the more complementary the nutrition, so the health care theory of miscellaneous grains appeared.