Vien Thong Buu Dien PTS Joint Stock Company Address: No 28, Lane 55, Nguyen Ngoc Nai Street, Khuong Mai Ward, Thanh Xuan District, Ha Noi City Enterprise code: 0102349713 Phone: 0986378668 Representative: Le Van Tan Adress: Chinh Nghia Hamlet, Nga Phu Commune, Nga Son District, Thanh Hoa Province Khuong Mai Ward, Thanh Xuan District, Ha Noi CityFounding date: 23 - 8 - 2007