Dr. Cheng was a Post-doctoral fellow in Karolinska Institute, Sweden. He is engaged in the clinical basic research on pancreatic diseases and digestive tumors, especially in the pathogenesis and treatment of pancreatitis, pancreatic cancer and liver cancer. He is good at interventional and endoscopic treatment of hepatobiliary and pancreatic diseases. In recent years, 6 papers have been included in the international SCI, more than 40 papers have been published in domestic core journals, 3 professional books have been compiled. He has undertaken 5 projects of Shandong Province young and middle-aged scientists, scientific and technological research, natural foundation and Shandong University projects, and participated in a number of projects of the National Natural Science Foundation of China and funds from the Ministry of Health.