Phat Trien Dich Vu Hoc Tap Va Giai Tri Truc Tuyen Joint Stock Company Address: Nha D7, Lot A/d6, Nguyen Phong Sac Keo Dai Street, Cau Giay District, Ha Noi City Enterprise code: 0101848406 Phone: 0245624196 Representative: Do Trung Nghia Adress: 55a Hang Chuoi, Pham Dinh Ho Ward Cau Giay District, Ha Noi CityFounding date: 3 - 1 - 2006