This phase III randomized clinical trial compared the long-term survival and safety of neoadjuvant chemoradiotherapy (NCRT) followed by surgery versus surgery with adjuvant therapy (AT) in patients with locally advanced esophageal squamous cell carcinoma (ESCC). Conducted at Sichuan Cancer Hospital, patients were randomly assigned to receive either NCRT (chemotherapy and radiotherapy followed by surgery) or AT (surgery followed by adjuvant therapy based on staging). The primary outcome was overall survival (OS), with secondary outcomes including disease-free survival (DFS), R0 resection rates, and treatment-related toxicity. A total of 245 patients were randomized, and 224 patients were included in the final analysis.