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을 만나서

… and meet

→ 을
phrase Very common #1,180
… and meet 을 marks the preceding noun as the object of 만나다 (“to meet”); 만나서 connects meeting with what happens next, often meaning “after meeting.”
KO: 선생님을 만나서 반가웠어요.
EN: I was glad to meet the teacher.

라오취안, 당신처럼 좋은 사람을 만나서 진짜 다행 이에요

Lao Quan, I’m truly glad I met someone as kind as you.

— 인생 (1994)