1. Efficacy of enhancing immunity: Rosa roxburghii can promote the phagocytic function of phagocytes, increase the number of B lymphocytes, and enhance the activity of natural killer cells, thus enhancing immunity and achieving the function of strengthening the body. 2. Anti-aging effect: Rosa roxburghii can effectively reduce the contents of free radicals and lipofuscin in the body, and also increase the contents of red blood cells and serum proteins, thus whitening the skin, making the complexion rosy and reducing wrinkles and spots. 3. Hypolipidemic effect: Rosa roxburghii can reduce serum cholesterol, triacylglycerol and lipid peroxide, thus reducing blood lipid and effectively resisting atherosclerosis. Rosa roxburghii can be soaked in water for a long time. Among many fruits, Rosa roxburghii contains the most vitamin C, which is 23 times that of hawthorn and 70 times that of citrus. It is known as the king of vitamin C in fruits. Vitamin C can soften blood vessels and reduce their brittleness. It is an ideal food for preventing hypertension, coronary heart disease and atherosclerosis. Vitamin C can also whiten skin, dilute pigmentation and enhance skin elasticity. Rosa roxburghii is rich in vitamin C, protein, fat, vitamin B 1, vitamin B2, carotene and vitamin P. Rosa roxburghii is rich in nutrition, unique in flavor, but cool in nature. Patients with spleen and stomach deficiency or epigastric pain should not drink Rosa roxburghii water for a long time in daily life.