Ky Thuat Tai Nguyen Va Moi Truong Lang Son Joint Stock Company Address: No 536, Hung Vuong Street, Mai Thanh Hamlet, Mai Pha Commune, Lang Son City, Lang Son Province Enterprise code: 4900896403 Phone: 0927228386 Representative: Pham Minh Vuong Mai Pha Commune, Lang Son City, Lang Son ProvinceFounding date: 10 - 8 - 2023