Thuong Mai & Dich Vu Ky Thuat Tan Thien Hoang LTD Address: No 19P Thuy Khue, Thuy Khue Ward, Tay Ho District, Ha Noi City Enterprise code: 0101125573 Phone: 0248474479 Representative: Nguyen Huy Hoang Adress: 48 Lan Ong, Hang Bo Ward, Hoan Kiem District, Ha Noi City Thuy Khue Ward, Tay Ho District, Ha Noi CityFounding date: 28 - 5 - 2001