This study include a multi-center, randomized, double-blind, placebo, parallel controlled clinical trial.The randomized clinical trial will enroll approximately 310 patients. Participants will be randomly divided into experimental (n=155) and placebo groups (n=155).Patients in the experimental group was treated with Qizhu Yuling prescription within 6 months after esophagus cancer R0. Patients in the control group will receive the placebo.The primary endpoint is 1-year DFS (Disease-free survival) rate after surgery, that refers to the proportion of patients who do not have recurrence, metastasis or death (from any cause) within 1 years after surgery. The research protocol was approved by the relevant ethics committees, and the study was conducted according to the Declaration of Helsinki and Good Clinical Practice guidelines. Patients gave written informed consent to participate in the trial.
The purpose of this study is to evaluate the efficacy and safety of Qizhu Yuling prescription for postoperative esophagus cancer.