Khoang San Red Stone Joint Stock Company Address: Phia Nam Industrial Zone, Van Tien Commune, Yen Bai City, Yen Bai Province Enterprise code: 5200871349 Phone: 0916751957 Representative: Phan Thi Bich Hien Van Tien Commune, Yen Bai City, Yen Bai ProvinceFounding date: 17 - 2 - 2017