Serplulimab Plus Bevacizumab and Chemotherapy for EGFR-mutant Metastatic NSCLC Patients After EGFR-TKI Treatment Failure

Inclusion Criteria: 1. Signed written informed consent before any trial-related processes; 2. Age ≥ 18 years and ≤70 years male or females; 3. Has a histologically or cytologically confirmed stage IIIB/IIIC (American Joint Committee on Cancer \[AJCC\] 8th edition) NSCLC that is unresectable and not fit for radical concurrent chemoradiotherapy, or metastatic / recurrent non-squamous NSCLC; 4. Patients with EGFR mutation confirmed by tumor histology or cytology or hematology prior to EGFR-TKI treatment 5. EGFR-TKI resistance, confirmed by RECIST 1.1 6. The Eastern Cancer Cooperative Group (ECOG) performance score of 0 or 1; Exclusion Criteria: 1. History of severe allergies to any study drug 2. Has previously received the following therapies: anti-PD-1, anti-PD-L1 or anti-PD-L2 drugs or any other stimulatory or inhibitory agents of T cell receptors 3. Previous exposure to VEGF inhibitor for anti-cancer treatment 4. Patients with untreated symptomatic brain metastases. Patients with treated brain metastases will be allowed if brain imaging obtained greater than 4 weeks from trial enrollment reveals stable disease. 5. Has received a live-virus vaccination within 28 days of planned treatment start 6. Interstitial lung disease or pneumonitis requiring oral or IV glucocorticoids Pregnant or breastfeeding, or expecting to conceive or father children within the projected duration of the study