Thi sơn, Kim Bang District, Ha Nam Province, Viet Nam

An Khanh Ha Nam Minerals Joint Stock Company

Tan Thuy Mineral Joint Stock Company

Trang Huy Minerals Company Limited

xay dung va thuong mai Hai Khanh Company Limited

Thien Hoa Linh Company Limited

Hoang Nguyen Ha Nam Company Limited

Hai Nam Mineral and Trding Joint Stock Company

Material and Trading Company Limited

vat lieu xay dung Viet Hung Company Limited

Dai Phuc Investment and Construction Materials Exploitation Joint Stock Company

Dong Tam Construction and Mineral Company Limited

Tien Son Company Limited

khai thac dA Hong Son Company Limited

Son Phu Product and Service Transport Company Limited

Tien Son Company Limited

Hoang Giang Company Limited

co phan Tan Hoang Phuong Company

Duy Anh Company Limited

Thien Son Investment and Mineral Exploiting Joint Stock Company

Hung Phu Company Limited