Tuan Hang Brick Company Limited
Thôn Mỹ Tượng, Xã Lãng Sơn, Yen Dung District
dong Quang Minh Joint Stock Company
xóm Tràng An, thôn Yên Hồng, Yên Lư, Yen Dung District
Tan Thinh - Tri Yen Brick Company Limited
Thôn Tân Thịnh, Xã Trí Yên, Yen Dung District