This study is a single-center, prospective, single-arm, open-label study. It will explore the efficacy and safety of tislelizumab combined with nab-paclitaxel in the first-line treatment of stage IVb esophageal squamous cell carcinoma on the basis of low-dose radiotherapy（40Gy/20f，5次/w）. To explore new treatment modalities and prolong patient survival.
This study is a single-arm, prospective, open-label clinical study to evaluate the safety and efficacy of tislelizumab combined with chemoradiotherapy in first-line treatment of patients with stage IVb esophageal squamous cell carcinoma.