Dau Tu Phat Trien Ha Tang Ky Thuat Dien Viet Nam Joint Stock Company Address: Hamlet 5, Thach Than Commune, Quoc Oai District, Ha Noi City Enterprise code: 0105725606 Phone: 02433943305 Representative: Bui Thanh Nam Adress: Hamlet 5, Thach Than Commune, Quoc Oai District, Ha Noi City Thach Than Commune, Quoc Oai District, Ha Noi CityFounding date: 13 - 12 - 2011