Dau Tu Xay Dung Hoang Anh Lang Son Joint Stock Company Address: Con Quyen Hamlet, Thach Dan Commune, Cao Loc District, Lang Son Province Enterprise code: 4900300451 Phone: 02053500527 Representative: Ngo Thu Hien Adress: No 116 Phan Dinh Phung, Hoang Van Thu Ward, Lang Son City, Lang Son Province Thach Dan Commune, Cao Loc District, Lang Son ProvinceFounding date: 6 - 3 - 2009