Phat Trien Cong Nghe Truong Son Joint Stock Company Address: No 263, Tran Dang Ninh Street, Dich Vong Ward, Cau Giay District, Ha Noi City Enterprise code: 0101518101 Phone: 0247545093 Representative: Pham Truong Giang Adress: 3 Khoi 1 Civil Group, Sai Dong Ward, Long Bien District, Ha Noi City Dich Vong Ward, Cau Giay District, Ha Noi CityFounding date: 16 - 8 - 2004