Khoan Da Dung - Xu Ly Nuoc Nam Son Thang Joint Stock Company Address: No 61, Civil Group 4, Yen So Ward, Hoang Mai District, Ha Noi City Enterprise code: 0102626325 Phone: 02436436145 Representative: Do Khanh Giang Adress: No 31, Lane 32, An Duong Street, Yen Phu Ward, Tay Ho District, Ha Noi City Yen So Ward, Hoang Mai District, Ha Noi CityFounding date: 25 - 1 - 2008