Homepage (English) : http://hongikac.wix.com/english

Facebook Page  (English) : http:www.facebook.com/hongikac

Youtube Chalnnel (English) : http://www.youtube.com/playlist?list=PLaNHcYq59k3zypQEVe6kd4QDrzkQ2aKUS

Instagram (English) : http://instagram.com/hongikacademy

 

Homepage (Korean) : http:www.hihd.co.kr

Naver Community (Korean) : http://cafe.naver.com/bohd

Facebook Page  (Korean) : http:www.facebook.com/HongikHdpg

Twitter (Korean) : http:www.twitter.com/HongikHd

Twitter of Mr.Yoon (Korean) : http:www.twitter.com/wppan

Youtube Channel (Korean) : http://www.youtube.com/user/HongikHd

Wiki Encyclopidia (Korean) : https://sites.google.com/a/hihd.co.kr/wiki/

YOUKU Channel (Chinese) : http://i.youku.com/u/UMTYwNTQ2MjY0OA