Diagnosis and treatment of congenital heart diseases, including surgical treatment of common congenital heart diseases such as ventricular septal defect and atrial septal defect. Surgical treatment of congenital complex cardiac malformations in neonate and infant, such as D-transposition of the great arteries, double outlet of the right ventricle, atrioventricular septal defect，total anomalous pulmonary venous connection, tetralogy of Fallot, and tricuspid valve malformation

Surgical treatment of general chest diseases in children such as chest wall deformity, lung cyst, esophageal hiatal hernia