A Study to Evaluate Efficacy, and Safety of QL2107 Plus Chemo and Compare With Keytruda in Participants With IV nqNSCLC

Inclusion Criteria: * Subjects who voluntarily participate, sign the Informed Consent Form (ICF), and are able to comply with the study procedures; * Subjects aged ≥ 18 and ≤ 75 years at enrollment, male or female; * Histologically or cytologically confirmed metastatic (stage IV) non-squamous NSCLC as per the American Joint Committee on Cancer (AJCC) 8th Edition; if multiple tumor histologies are present, the predominant cell type should be classified; * No EGFR sensitive mutations or ALK gene translocations. * Expected survival ≥ 3 months; * Eastern Cooperative Oncology Group (ECOG) performance status score: 0 or 1; Exclusion Criteria: * Pulmonary radiation therapy \> 30 Gy within 6 months prior to the first dose; * Palliative radiation therapy completed within 7 days prior to the first dose; * Any other form of anti-tumor therapy expected to be required during the study; * Uncontrolled or symptomatic pericardial effusion, pleural effusion and ascites requiring repeated paracentesis and drainage; * Presence of metastases to brain stem, meninges and spinal cord or compression;