Khoang San An Vuong Lang Son Joint Stock Company Address: Lan Ang Hamlet, Hung Vu Commune, Bac Son District, Lang Son Province Enterprise code: 4900598478 Phone: 0904030068 Representative: Do Thanh Tuan Adress: No 54, Phung Hung, Hang Bong Ward, Hoan Kiem District, Ha Noi City Hung Vu Commune, Bac Son District, Lang Son ProvinceFounding date: 8 - 7 - 2010