This study focuses on investigating the effects of Tai Chi exercise. Specifically, it examines the impact of Tai Chi on balance and sleep quality. The target group consists of patients with colorectal cancer. These patients are also undergoing chemotherapy. The intervention in the study is a behavioral Tai Chi exercise program. The study was sponsored by Ya-Fen Fan, Mackay Memorial Hospital, and Hungkuang University. This clinical trial has already been completed.