The recurrence rate of breast cancer is relatively high within five years after the operation, especially the first three years after the operation is the peak period of recurrence, and after five years after the operation, the recurrence rate is relatively lower. However, the specific recurrence situation should be considered according to the typing and staging of breast cancer. The details are as follows: 1. Breast cancer typing: hormone receptor-positive patients have relatively late recurrence; triple-negative and HER-2-positive patients have relatively early recurrence; 2. Breast cancer staging: patients with later stages, such as III-B and III-C, have relatively early recurrence; those with earlier II stage have relatively late recurrence.