Hai Son Joint Stock Company Address: Tan Long Street, Van Quan Town, Van Quan District, Lang Son Province Enterprise code: 4900277876 Phone: 0912007647 Representative: Dang Minh Nhat Adress: Da Pho Hamlet, Hong Phuc Commune, Ninh Giang District, Hai Duong Province Van Quan Town, Van Quan District, Lang Son ProvinceFounding date: 24 - 6 - 2008