Ky Thuat Tan Hai Van LTD Address: No 67, Yen So Street, Yen So Ward, Hoang Mai District, Ha Noi City Enterprise code: 0101500908 Phone: 0246441131 Representative: Nguyen Ngoc Son Adress: 6 Yen Duyen Civil Group, Yen So Ward, Hoang Mai District, Ha Noi City Yen So Ward, Hoang Mai District, Ha Noi CityFounding date: 24 - 6 - 2004