Congenital heart disease is one of the common congenital anomalies in children, and the more common ones are “simple precocious heart disease” such as ventricular septal defect, atrial septal defect and patent ductus arteriosus, and “complex precocious heart disease” such as tetralogy of Fallot, atrioventricular septal defect and pulmonary atresia, etc. The specific causes The exact cause is not yet known, and may be related to atmospheric pollution and environmental degradation. Even if the child survives, he or she is prone to recurrent respiratory infections, growth retardation, and poor physical strength during growth and development. If left untreated, it will eventually lead to life-threatening pulmonary hypertension, heart enlargement, and heart failure. The diagnosis of precocious heart disease often begins with the detection of a “heart murmur” or “cyanosis” in the child. Further examination, usually a professional cardiac color ultrasound can confirm the diagnosis for most precardiac diseases, but a few complex precardiac diseases require cardiac catheterization, cardiac CT and other tests to determine the condition. For parents, they should pay more attention to their children and go to a regular hospital for timely diagnosis once the following manifestations appear: (1) frequent colds, recurrent respiratory infections or pneumonia; (2) weak crying, poor growth and wasting; (3) difficulty in feeding, babies usually have shortness of breath, like to be held upright, and sweat a lot; (4) children complain of easy fatigue, poor stamina, blue around the mouth (5) blue lips and fingernails or bruising after crying.