MTV Duong Khang Bac Son LTD Address: No 137, Khoi, Tran Dang Ninh Street, Bac Son Town, Bac Son District, Lang Son Province Enterprise code: 4900815933 Phone: 0978008559 Representative: Nguyen Huu Giang Bac Son Town, Bac Son District, Lang Son ProvinceFounding date: 8 - 12 - 2017