Tislelizumab Combined With sCRT in Stage IIIB/C-IV Non-Squamous Non-Small Cell Lung Cancer：A Prospective, Single-Arm, Phase II Study

Inclusion Criteria: 1. Age 18-75 years old, gender is not limited; 2. Eastern Cooperative Oncology Group (ECOG) performance status 0-2. 3. Patients with stage IIIB/C-IV non-squamous non-small cell lung cancer confirmed by cytology or histology; 4. Patients who have not received prior systemic therapy; Exclusion Criteria: 1. Patients with uncontrolled autoimmune diseases; 2. Patients who have had autoimmune reactions in the past 6 months and have not improved or are unstable despite appropriate treatment, such as untreated or unstable pneumonia, thyroiditis, myocarditis, etc.; 3. Patients known to carry driver gene mutations such as EGFR mutation, ALK translocation, BRAF, ROS1, RET, MET, etc.; 4. Patients who have received prior systemic therapy, or those who have received adjuvant or neoadjuvant therapy with a recurrence time of less than 3 months from the last treatment; 5. Patients with known allergies or contraindications to the study drug or its excipients; 6. Pregnant or lactating female patients, or female patients of childbearing potential with a positive baseline pregnancy test; 7. Female patients of childbearing potential or male patients with reproductive plans who are unwilling to use effective contraception during the entire trial period and for 6 months after the end of the trial; 8. Patients whose comorbidities or other conditions may affect compliance with the protocol or are deemed unsuitable for participation in this study by the investigator.