On June 17, 2017, we had an interview with Dr. Boran Cheng, an expert in the Department of Oncology, Peking University Shenzhen Hospital. From the communication, we learnt: 1) Current primary treatment of cancer is surgery; 2) Early diagnosis significantly improves patient survival rate; 3) Gene therapy and immunotherapy may cure cancer in the future. About CRISPR/CAS9 system in the treatment of cancer, Dr. Cheng believed in that it is a promising therapy, but there will be a long way to go. We want to work hard to fulfill this dream.