In the brain metastases subgroup (n=8), the mPFS was 10.6 months, ORR was 25% and DCR was 88%. Among 14 pts who received third-line aumolertinib treatment, the mPFS was 6.3 months, ORR was 0% and DCR was 79% (Efficacy; Table)...Aumolertinib showed promising antitumor activity with manageable toxicity as second- and third-line therapy in EGFR T790M-negative/unknown NSCLC with or without brain metastases.