Vien Thong Hau Giang Lang Son LTD Address: 1a Highway, Dai Son Hamlet, Hop Thanh Commune, Cao Loc District, Lang Son Province Enterprise code: 4900814841 Phone: 0967585040 Representative: Chu Van Giang Hop Thanh Commune, Cao Loc District, Lang Son ProvinceFounding date: 7 - 11 - 2017