Dr. Chang Chen is a thoracic surgeon and the director of Tongji University-affiliated Shanghai Pulmonary Hospital. He received his medical degree and Ph.D. degree from Nanjing University and Soochow University, respectively. He was trained at Shanghai Pulmonary Hospital and Washington University School of Medicine, St Louis, Missouri (2002-2003, sponsored by China Scholarship Council). And he has more than 22 years of experience as a thoracic surgeon and devoted his clinical practice to diagnosing and treating patients with thoracic disease.