Cong Nghe Hoa Chat - Son Ti Tan Joint Stock Company Address: No 4, Tran Phu Street, Hang Bong Ward, Hoan Kiem District, Ha Noi City Enterprise code: 0101428673 Phone: 0249287708 Hang Bong Ward, Hoan Kiem District, Ha Noi CityFounding date: 18 - 12 - 2003