Sun Yat-sen University (SYSU) - Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Sun Yat-sen University (SYSU) - Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Sun Yat-sen University (SYSU) - Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Sun Yat-sen University (SYSU) - Department of Gastric Surgery, Guangzhou Aptiligent Technology Co. Ltd., Guangzhou Aptiligent Technology Co. Ltd., Sun Yat-sen University (SYSU) - Department of Clinical Research Center, Sun Yat-sen University (SYSU) - Department of Colorectal Surgery, Sun Yat-sen University (SYSU) - Department of Endoscopic Surgery, Sun Yat-sen University (SYSU) - Department of Endoscopic Surgery, Sun Yat-sen University (SYSU) - Department of Endoscopic Surgery, Sun Yat-sen University (SYSU) - Department of Pathology, Sun Yat-sen University (SYSU) - Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Sun Yat-sen University (SYSU) - Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Sun Yat-sen University (SYSU) - Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases and Sun Yat-sen University (SYSU) - Department of Oncology