Regarding the examination of congenital heart disease, there are several methods: 1. Asking medical history and physical examination, for patients with congenital heart disease, there will be a history of recurrent respiratory infections, palpitations, cyanosis of the lips, etc. On auscultation, heart murmurs can be heard in different parts of the heart, such as ventricular septal defect can be heard in the 2nd-4th intercostal space on the left edge of the sternum, and arteriovenous insufficiency can be heard in the 2nd-3rd intercostal space on the left edge of the sternum with continuous 2.Electrocardiogram and chest radiographs. 3.The vast majority of patients with congenital heart disease, such as ventricular septal defect, atrial septal defect, patent ductus arteriosus and tetralogy of Fallot, can be clearly diagnosed by cardiac ultrasound, which has the advantages of being safe, non-invasive and accurate. 4.For complex congenital heart disease, a clear diagnosis can be made by right heart catheterization or cardiac angiography. 5.Some Patients also need to do CT or MRI.