Tu Van Va Xay Dung Long Viet Joint Stock Company Address: Phieng Ban I, Bac Yen Town, Bac Yen District, Son La Province Enterprise code: 5500395080 Phone: 02123861618 Representative: Le Manh Chien Adress: Dinh Hamlet, Lien Vi Commune, Quang Yen Town, Quang Ninh Province Bac Yen Town, Bac Yen District, Son La ProvinceFounding date: 5 - 4 - 2010