Whether a child with low birth weight is stunted or not is determined by the dietary intake, feeding style and the presence of pathological factors in the later stages of life, and cannot be determined solely by birth weight. Newborns weighing less than 2,500 grams are called low-birth-weight babies, of which 1,000-1,499 grams are called very low-birth-weight babies, and less than 1,000 grams are called ultra-low-birth-weight babies. For low-birth-weight newborns, you can be guided by your doctor to assist in gaining weight in three ways: 1. Breastmilk with breastmilk nutritional enhancers: to help infants intake of high-density nutrients and promote pediatric growth and development. 2. With the complementary food intake of high-density nutrients: under the premise of ensuring balanced nutrition, try to improve the nutritional density, that is, the same amount of food, the consumption of complementary food, the thicker, the more can help the child to catch up with the weight, but at the same time to ensure that the child chewing smooth and well absorbed. 3. Milk powder: Consider changing from regular milk powder to preterm milk powder. Preterm milk powder has more calories than normal milk powder, which is good for low weight babies to catch up with their weight.