Hong Ling is also called water chestnut. Water chestnut is rich in starch, protein, glucose, unsaturated fatty acids and various vitamins, such as vitamin B 1, B2 and C, carotene and trace elements such as calcium, phosphorus and iron. The ancients believed that eating more water chestnuts can replenish the five internal organs, eliminate all diseases and make people keep fit. The so-called intellectual bodybuilding has the function of losing weight and bodybuilding, because water chestnut does not contain fat that makes people fat. Compendium of Materia Medica says: Water chestnut can tonify the spleen and stomach, strengthen the legs and knees, strengthen physical strength, and benefit qi. Water chestnut porridge is beneficial to the gastrointestinal tract and can relieve internal heat, which is good for the health of the elderly. Modern pharmacological experiments show that water chestnut has certain anti-cancer effect. Can be used for preventing and treating esophageal cancer, gastric cancer, and uterine cancer. The method is to use 20 raw water chestnuts, add appropriate amount of water and use 1 slow fire three times a day. Or use 100 gram of water chestnut meat and add 30 grams of coix seed to cook porridge.