Dau Tu Xay Dung Va Moi Truong Cong Son Joint Stock Company Address: No 13, Khoi 7, Cao Loc Town, Cao Loc District, Lang Son Province Enterprise code: 4900421791 Phone: 0945037469 Representative: Ly Thanh Son Adress: No 45, Tam Thanh Street, Tam Thanh Ward, Lang Son City, Lang Son Province Cao Loc Town, Cao Loc District, Lang Son ProvinceFounding date: 6 - 11 - 2009