Hop Tac Xa Dich Vu Tong Hop Son A Address: Ban Vieng Hamlet, Son A Commune, Van Chan District, Yen Bai Province Enterprise code: 5200243457 Phone: 0216872715 Representative: Lo Minh Yen Son A Commune, Van Chan District, Yen Bai ProvinceFounding date: 19 - 8 - 2005