Diet: A high-protein, high-nutrient, easy-to-digest diet is the mainstay. For special diets, such as celiac disease skimmed and low-fat diet, the supervising physician nurse will have special requirements. For children with mild cases, water intake is not strictly restricted after surgery. However, for children with complicated precardiac disease or cardiac insufficiency, the intake should be controlled appropriately, and the supervising physician will adjust the intake and output according to the baby’s condition. Postoperative intake and output should be recorded for 24 hours, usually from 6:00 am as a recording cycle. The intake mainly includes fluids, oral medications, water, drinks, milk, porridge, soup, fruit and solid food. The output includes urine, stool, drainage fluid, sweat, vomit, etc. Drainage tube and deep vein placement: some babies still have chest drainage tube unremoved, if there is not much drainage fluid, it can be removed at the bedside. The deep vein tube in the neck is kept for 3-5 days and removed. Prevent infection: strengthen back patting therapy, encourage coughing and coughing up sputum to prevent complications such as lung infection and pulmonary atelectasis. For older babies, encourage early movement to the floor, which is very important for postoperative recovery and can stimulate gastrointestinal peristalsis, improve appetite and promote wound healing. Babies who can’t walk practice sitting alone, holding upright and supporting walking. Care of surgical incision: pay attention to prevent infection, keep local dryness, avoid rubbing and scratching, if the pain is severe, sedation and analgesic treatment can be given. Temperature: Some babies may have a low fever (<38℃) 3 to 5 days after surgery, which is usually absorbed fever and can be treated by physical cooling. If the fever persists, the doctor and nurse will promptly identify the cause and provide further treatment. Removal of stitches: If the course of the disease is smooth, the stitches can be removed 7 days after surgery. If the baby appears to have internal threads exposed in the local incision after discharge, they can be removed at the local hospital. Post-operative medication: general precordial disease with good cardiac function (atrial septal defect, ventricular septal defect, patent ductus arteriosus, etc.) may not require medication after discharge. After discharge from the hospital, children with relatively serious and complicated precardiac disease should follow the doctor's instructions to take medication on time, review regularly, and reduce or stop medication under the guidance of the doctor.