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
조공을 바치는 것은 고대 사회에서 중요한 관습이었다.Jogongeul bachineun geoseun godae sahoeeseo jungyohan gwansub-ieotda.Paying tribute was an important custom in ancient societies.