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You can meet Mr. Sim Chan-woo's lectures and contents both online and offline. ■ Online lecture - Orbi Class / Korean language area → https://class.orbi.kr/teacher/94 ■ Offline lecture (1) Sidae Talent → https://www.sdij.com (2) Daechi Yesum → https://www.yesum.co.kr (3) Daechi MassiveXOrbi → https://massivedu.co.kr/orbibymassiv (4) Songpa Logos → https://www.logosedu.net