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
요순시절은 고대 중국의 이상적인 시대를 의미합니다.Yosun sijyeoreun godae Jungguk-ui isangjeog-in sidaereul uimi-hamnida.The era of Yao and Shun refers to an idealized period in ancient China.