Tu Van Khao Sat - Thiet Ke Hoanh Son LTD Address: TK 6, Hai Thanh Ward, Dong Hoi City, Quang Binh Province Enterprise code: 3100393254 Phone: 02323846123 Representative: Bui Van Thuan Adress: TK 6, Hai Thanh Ward, Dong Hoi City, Quang Binh Province Hai Thanh Ward, Dong Hoi City, Quang Binh ProvinceFounding date: 27 - 11 - 2007