Dau Tu Phat Trien Ha Tang Vien Thong Cuu Long Joint Stock Company Address: Harmony Building, Lau G, No 47, 49, 51 Phung Khac Khoan, Da Kao Ward, District 1, Ho Chi Minh City Enterprise code: 0309035819 Phone: 02822294255 Representative: Nguyen Duc Nam Da Kao Ward, District 1, Ho Chi Minh CityFounding date: 26 - 6 - 2009