Dau Tu XD Va PT Ky Thuat Ha Tang Thanh Nam Address: No 191, Civil Group 7, Vi Xuyen Town, Vi Xuyen District, Ha Giang Province Enterprise code: 5100174009 Phone: 0219826519 Vi Xuyen Town, Vi Xuyen District, Ha Giang ProvinceFounding date: 27 - 5 - 2003