Tu Van Khao Sat Xay Dung Ha Noi Joint Stock Company Address: P809, Nha A1, Den Lu Ii Urban Area, Hoang Van Thu Ward, Hoang Mai District, Ha Noi City Enterprise code: 0102048473 Phone: 0983251811 Representative: Do Xuan Dan Adress: 10 Doi 5 Hamlet, Xuan Thuong Commune, Xuan Truong District, Nam Dinh Province Hoang Van Thu Ward, Hoang Mai District, Ha Noi CityFounding date: 16 - 10 - 2006