Dich Vu Ky Thuat Va Thuong Mai O To Nui Dau Joint Stock Company Address: Po Tang Hamlet, Hop Thanh Commune, Cao Loc District, Lang Son Province Enterprise code: 4900887783 Phone: 0964398536 Representative: Vy Van Luan Adress: Na Duong - Na Phai Hamlet, Na Duong Town, Loc Binh District, Lang Son Province Hop Thanh Commune, Cao Loc District, Lang Son ProvinceFounding date: 6 - 6 - 2022