Tan Tianmeng: Cereals are the general name of cereal crops mainly composed of gramineous plants, in which rice and wheat account for more than half of the world's total grain output. Many miscellaneous grains familiar to consumers in China also belong to cereals, such as corn, oats, buckwheat, millet and purple rice.

According to the degree of processing, grains can be divided into refined grains and whole grains, among which whole grains are characterized by retaining endosperm, germ, bran and nutrients of whole grains. It can be whole grain, or it can be a product after simple treatment such as grinding, crushing and tabletting.

Whole grain food refers to all kinds of foods processed from whole grains. Whole grains are widely used in food industry and catering industry. Among them, the common whole grain main foods or convenience foods in the market include: instant (boiled) grains, such as instant oatmeal and mixed grain powder; Flour products, such as whole wheat steamed bread, whole wheat bread, whole wheat noodles, etc. ; Rice, such as brown rice, oat rice and miscellaneous grains rice,

Steamed brown rice, etc. In addition, in some drinks, yogurt, snacks and snacks, such as cereal bars, brown rice cakes and biscuits, whole grains are also used.

At present, there is no uniform definition and standard for whole grain and whole grain food, and there is no uniform requirement for the proportion or content of whole grain raw materials in whole grain food in various countries and regions. At present, relevant institutions in China are formulating relevant standards for whole grain and whole grain food, so as to standardize the development of the industry and facilitate the public to choose whole grain food reasonably.