Dau Tu & Xay Dung Cong Trinh 646 Joint Stock Company Address: No 9, Alley 88/1, Vo Thi Sau Street, Thanh Nhan Ward, Hai Ba Trung District, Ha Noi City Enterprise code: 0101157656 Phone: 0246272250 Representative: Tran Hoang Oanh Adress: 116 Dai La Truong Dinh, Hai Ba Trung District, Ha Noi City Thanh Nhan Ward, Hai Ba Trung District, Ha Noi CityFounding date: 30 - 8 - 2001