Most colorectal cancers recur within 3 years after radical colorectal cancer surgery, so it is important to follow your specialist’s advice and have regular follow-up reviews during this period. Colorectal cancer is a common malignant tumor of the digestive tract. Current clinical data show that 80% to 90% of colorectal cancer recurrence occurs within 3 years after surgery, while the recurrence rate is low at 5 years after surgery, even less than 5%. It is recommended to follow the specialist’s advice for regular follow-up within 3 years after surgery, which generally requires total colonoscopy in the 1st and 3rd year after surgery, and CT scanning of chest, abdomen and pelvis every year within 3 to 5 years after surgery, and regular rechecking of carcinoembryonic antigen level in order to find out whether there is any recurrence of the tumor in a timely manner.