Hong Yen Address: Nuoc Mat Hamlet, Au Lau Commune, Yen Bai City, Yen Bai Province Enterprise code: 5200216742 Phone: 02163864322 Representative: Trinh Van Yen Adress: Nuoc Mat Hamlet, Au Lau Commune, Yen Bai City, Yen Bai Province Au Lau Commune, Yen Bai City, Yen Bai ProvinceFounding date: 9 - 2 - 2004