Vien Thong, Thuong Mai Va Xuat Nhap Khau Sigma LTD Address: Thuong Hamlet, Me Tri Ward, Nam Tu Liem District, Ha Noi City Enterprise code: 0105492990 Phone: 02437871070 Representative: Doan Y Lan Adress: No 21, Thanh Street, Cua Dong Ward, Hoan Kiem District, Ha Noi City Me Tri Ward, Nam Tu Liem District, Ha Noi CityFounding date: 9 - 9 - 2011