RecruitingPhase 2Drug trialHigh-dose Furmonertinib for First-line Treatment of EGFR Mutated NSCLC With Central Nervous System (CNS) MetastasesEGFR mutated NSCLC patiens with CNS metastases have poor prognosis. High-dose furmonertinib (160mg/day) have produced high CNS PFS and ORR in second-line for EGFR T790M mutated NSCLC. Whether EGFR mutated NSCLC with CNS metastases can benefit from first-line treatment of high-dose furmonertinib has not been reported. This study aims to investigate the efficacy and safety of high dose furmonertinib in first-line treatment of EGFR mutated NSCLC patiens.