Randomized Controlled Study on Optimize Neoadjuvant Chemoradiotherapy for Locally Advanced Rectal Cancer

All rectal cancer patients in this group will receive induction, gap chemotherapy (capecitabine combined with oxaliplatin) alone with chemoradiotherapy (capecitabine combine with oxaliplatin) before surgery.

All rectal patients in this group will receive standard radiotherapy and surgical resection.