In the era of smart age, I opened a mobile app in Okdong Hanyang Taekwondo! Our Okdong Hanyang Taekwondo Center is a new concept gymnasium that provides faster gymnastics and differentiated education from other gymnasiums. It focuses on humanity education and provides the most necessary education for our children, such as school physical education, obesity management, and kiki gymnastics. Now is the age of communication between parents and gymnasium. The world of smartphone that 52 million peo