Lung cancer is one of the most common types of cancer and is the most common cause of death from cancer (almost 20 percent \[%\] of cancer deaths); NSCLC accounts for 80% to 85% of lung cancers. The hypothesis is that osimertinib combined bevacizumab in patients with locally advanced or metastatic NSCLC characterized by EGFR Exon 20ins activating mutations. Efficacy assessments will include disease assessment, symptomatic progression and patient-reported outcome. Safety assessments will include physical examinations, vital signs, electrocardiograms (ECGs), Eastern Cooperative Oncology Group (ECOG) performance status and clinical safety laboratory assessments (serum chemistry, hematology, coagulation, and urinalysis).