This is a single-arm, sequential study assessing the efficacy and safety of SMET12 and Toripalimab combined chemotherapy in patients with EGFR positive advanced non-small cell lung cancer (NSCLC) : first-line treatment or failed from first-line immune checkpoint inhibitor treatment.The primary objective is to evaluate the anti-tumor activity and safety of SMET12 and Toripalimab combined chemotherapy in patients with EGFR positive advanced NSCLC.