Thuong Mai & Dich Vu Ky Thuat Yen Oanh LTD Address: Can Ho 18 - F3, Tap The Tran Hung Dao, Dong Nhan Ward, Hai Ba Trung District, Ha Noi City Enterprise code: 0105739817 Phone: 02422109347 Representative: Dam Manh Tien Dong Nhan Ward, Hai Ba Trung District, Ha Noi CityFounding date: 19 - 12 - 2011