2. Sweet potato is a sticky food made of glutinous rice flour or other starch. Also called grass cake in Chinese mainland, it has the effects of nourishing the stomach, strengthening the spleen and supplementing energy. Glutinous rice flour is the main component of nourishing stomach and strengthening spleen. Glutinous rice is warm and suitable for people with spleen and stomach deficiency and cold. It can nourish the stomach and strengthen the spleen, and also provide a variety of nutrients for the human body, with a balanced diet.