Cong Nghe Va Thuong Mai Sigma LTD Address: No 16, 643 Pham Van Dong Lane, Co Nhue 1 Ward, Bac Tu Liem District, Ha Noi City Enterprise code: 0101930185 Phone: 0247871070 Representative: Than Thi Thuy Duong Adress: Civil Group 34, Song Mai Commune, Bac Giang City, Bac Giang Province Co Nhue 1 Ward, Bac Tu Liem District, Ha Noi CityFounding date: 3 - 5 - 2006