Voi su ket hop hoan hao giua cac tro choi giai tri va cac su kien the thao hap dan, OK9 da tao nen mot nen tang vung chac, mang den cho nguoi choi nhung trai nghiem tuyet voi va day hap dan. Thong tin lien he: Email:ok9.school@gmail.com Websites:https://ok9.school/ Phone: 0978112462 Hastag:#OK9 #OK9SCHOOL #NHACAIOK9 #THETHAOOK9 #BONGDAOK9 #DANGKYOK9