For postoperative patients, due to postoperative weakness and various complications, some patients will have symptoms of eating difficulties and anorexia, leading to postoperative malnutrition, low immunity, easy infection of wounds, slow healing, and serious other complications. After operation, patients can take Quananzu to supplement nutrition. Quananzu contains protein, carbohydrates, unsaturated fatty acids, vitamins and minerals and other essential nutrients. Six spoonfuls a day can help patients supplement comprehensive and balanced nutrition, prevent malnutrition, improve immunity, lay a good nutritional foundation and speed up the recovery process.