Dr. Ke Xu is working as a physician and a research assistant professor in Oncology Department of The First Affiliated Hospital of Chengdu Medical College. He engaged in basic research and clinical work of lung cancer and gastrointestinal oncology. He received many awards/honors and published more than 20 academic papers in peer-reviewed journals. At present, the main research directions are as follows: First, the construction of tumor diagnosis and prognosis model; Second, DNA methylation and the development of cancer. Correspondence: Ke Xu (xuke@cmc.edu.cn)