Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
맹자정문은 인간의 본성을 설명하는 중요한 개념입니다.maengjajeongmun-eun ingan-ui bonseong-eul seolmyeonghaneun jungyohan gaenyeom-imnida.Mencius' Four Beginnings is an important concept explaining human nature.