Khai Son Address: Hamlet 4, Dai Hung, Khoai Chau District, Hung Yen Province Enterprise code: 0900293077 Phone: 02213918223 Representative: Chu Thi Son Adress: Hamlet 4, Dai Hung Commune, Khoai Chau District, Hung Yen Province Dai Hung Commune, Khoai Chau District, Hung Yen ProvinceFounding date: 31 - 10 - 2008