Kim Il-sung was born in Mangyongdae-guyok to Methodist parents.[22] His father Kim Hyong-jik was 15 when he married Kang Pan-sok two years his elder.[23] Kim Hyong-jik had attended a school founded by Protestant missionaries, which influenced his own family. Kim Hyong-jik became a father at the age of 17, and left school to work as a teacher in a nearby school he once attended. He later practiced Chinese herbal medicine as a doctor.