Bac Yen Son LTD Address: KM 18, 1a Highway, Trung Cap Hamlet, Mai Pha Commune, Lang Son City, Lang Son Province Enterprise code: 4900808485 Phone: 0945999987 Representative: Le Cao Quy Mai Pha Commune, Lang Son City, Lang Son ProvinceFounding date: 21 - 4 - 2017