Khai Thac Khoang San Hoa An Joint Stock Company Address: Civil Group 8, Hop Giang Ward, Cao Bang City, Cao Bang Province Enterprise code: 4800930146 Phone: 0989892626 Representative: Dao Hong Huy Hop Giang Ward, Cao Bang City, Cao Bang ProvinceFounding date: 28 - 12 - 2021