A Study Evaluating the Efficacy and Safety of Tislelizumab Versus Chemotherapy in Advanced Non-Squamous Non-small Cell Lung Cancer

Inclusion Criteria:

1. Age 18-75 years old, male or female, signed informed consent form
2. Advanced NSCLC diagnosed by pathological or clinical physicians
3. Eastern Cooperative Oncology Group (ECOG) performance score ≤ 1
4. Participants must have ≥ 1 measurable lesion as defined per RECIST v1.1
5. Participants must have no prior systemic chemotherapy for advanced or metastatic NSCLC
6. Life expectancy ≥ 12 weeks
7. Participants must have adequate organ function
8. Male/female is willing to use a highly effective method of birth control

Exclusion Criteria:

1. Diagnosed with NSCLC but with epidermal growth factor receptor (EGFR)-sensitizing mutation or anaplastic lymphoma kinase (ALK) gene translocation
2. Received any approved systemic anticancer therapy within 28 days prior to the initiation of study treatment
3. Received prior treatment with EGFR inhibitors or ALK inhibitors
4. Received prior therapies targeting programmed cell death protein-1 (PD-1) or programmed cell death protein ligand-1 (PD-L1)
5. With history of interstitial lung disease, non-infectious pneumonitis or uncontrolled systemic diseases
6. Clinically significant pericardial effusion
7. Severe infections, active leptomeningeal disease or uncontrolled, untreated brain metastasis
8. Any major surgical procedure ≤ 28 days before randomization
9. Human immunodeficiency virus (HIV) infection
10. Participants with untreated hepatitis B or C virus (HBV/HCV)
11. Active autoimmune diseases or history of autoimmune diseases
12. History of allergic reactions to chemotherapy

NOTE: Other protocol defined Inclusion/Exclusion criteria may apply.