For ventricular septal defects less than 5 mm in diameter, located in the perimembranous or myocardial region, secondary foramen ovale defects, and arteriovenous ductus arteriosus with a small diameter, there is a possibility of self-healing and surgery may not be urgent, provided that the presence of this cardiac malformation does not have a significant impact on the growth and development of the child. Therefore, parents are asked to review the defect periodically while waiting for it for two purposes: first, to detect whether the size of the defect tends to decrease; second, to observe whether there are complications such as enlarged heart and increased pulmonary artery pressure. For children with no decrease in defect size and progressive increase in pulmonary artery pressure, there is no point of further waiting and surgery is needed as soon as possible. Parents who have any questions about the above tests can communicate with me one-on-one via telephone consultation, so as not to delay treatment and delay the child’s condition. Approximately 1/2 of all children with precocious heart disease die within the first year of life due to severe heart malformations. The survivors develop recurrent respiratory infections and developmental disorders at all ages of their growth and development. In mild cases, the early stage may also be asymptomatic, but the presence of precordial murmur will affect the child’s schooling and employment. If left untreated, it will eventually lead to pulmonary hypertension, heart enlargement, heart failure, and in some cases, endocarditis, embolism, hemorrhage, hypertension, which is life-threatening and brings a heavy mental and economic burden to the family.