...- 1) The patient voluntarily participated in this study and signed an informed consent form; 2) Age>18 years old, both male and female; 3) Advanced stage unresectable or metastatic NSCLC (stage IIIB, IIIC, or IV) confirmed by histology or cytology, with the presence of EGFR 21 exon L858R mutation in the driving gene; 4) According to the criteria for evaluating the efficacy of solid tumors (RECIST 1.1), at least one measurable lesion is used as the target lesion; 5) The Eastern Cancer Collaborative Group's Physical State Score (ECOG PS) is 0 to 3 points; 6) Expected survival time is more than 3 months; 7) Newly treated patients who have...