Study of MCLA-129 Combined With Befotertinib in the Treatment of Advanced Non-small Cell Lung Cancer With EGFR Sensitive Mutation

This is a phase I study to evaluate the safety, pharmacokinetic characteristics and antitumor activity of anti-EGFR/c-Met bispecific antibody MCLA-129(1500mg Q2W IV or 2000mg Q2W IV) combined with Befotertinib (75 mg once daily for first cycle, then increased to 100 mg once daily, orally) in Patients of advanced non-small cell lung cancer with exon 19 deletion or exon 21 L858R mutation(either alone or in combination with other EGFR mutations).