Dau Tu Cong Nghe Ky Thuat Cao Quang Thinh Joint Stock Company Address: No 154, Duc Tam 1 Street, Van Quan Town, Van Quan District, Lang Son Province Enterprise code: 4900806343 Phone: 0913299757 Representative: Hoang Van Trinh Van Quan Town, Van Quan District, Lang Son ProvinceFounding date: 13 - 3 - 2017