Quang Cao Va Truyen Thong Blue Sky Viet Nam Joint Stock Company Address: No 30, Xuan Thuy Street, Quan Hoa Ward, Cau Giay District, Ha Noi City Enterprise code: 0101915042 Phone: 02038562539 Representative: Le Xuan Hung Adress: Hau Xa Hamlet, Cao Xa Commune, Tan Yen District, Bac Giang Province Quan Hoa Ward, Cau Giay District, Ha Noi CityFounding date: 17 - 4 - 2006