Vien Chien Address: Luong Me Hamlet, Chieng Dong Commune, Yen Chau District, Son La Province Enterprise code: 5500381835 Phone: 02123841058 Representative: Lo Van Toi Adress: Chieng Sang Hamlet, Chieng Sang Commune, Yen Chau District, Son La Province Chieng Dong Commune, Yen Chau District, Son La ProvinceFounding date: 13 - 10 - 2009