Early resection of cancer is curable, especially for lung cancer, breast cancer, colorectal cancer. The main treatment for these tumors is radical surgical resection and systemic lymph node dissection, through radical surgical resection and systemic lymph node dissection, these cancers can be cured in early stage, and they can be treated without radiotherapy, chemotherapy or targeted therapy after surgery. Of course, it is repeatedly emphasized that in the case of early stage of cancer, locally advanced or advanced cancer needs to be eliminated by radiotherapy and chemotherapy to bring it down to a lower stage before it is possible is to implement radical surgery. If chemotherapy cannot achieve the purpose of down-staging or the disease progresses, there is no way to do surgical resection, so early diagnosis, early treatment and early surgery are emphasized.