Hoan Kiem Joint Stock Company Address: No 13, Tap The Ga Long Bien, Dong Xuan Ward, Hoan Kiem District, Ha Noi City Enterprise code: 0101372029 Phone: 02439274324 Representative: Nguyen Van Chien Adress: No 26, Vinh Phuc I, Cong Vi Ward, Ba Dinh District, Ha Noi City Dong Xuan Ward, Hoan Kiem District, Ha Noi CityFounding date: 11 - 6 - 2003