Duoc Quan Ngoc LTD Address: No 1, Lane 273, Nguyen Khoai Street, Thanh Luong Ward, Hai Ba Trung District, Ha Noi City Enterprise code: 0101518630 Phone: 0248210984 Representative: Mai Thiem Adress: P13 Nha A6 KTT Khuong Thuong, Trung Tu Ward, Dong Da District, Ha Noi City Thanh Luong Ward, Hai Ba Trung District, Ha Noi CityFounding date: 17 - 8 - 2004