Tu Van Dich Vu Ky Thuat Thang Long Joint Stock Company Address: No 23B, Lane 4, Ha Tri 4, Ha Cau Ward, Ha Dong District, Ha Noi City Enterprise code: 0107964254 Phone: 02433602366 Representative: Le Ton Duc Ha Cau Ward, Ha Dong District, Ha Noi CityFounding date: 21 - 8 - 2017