Historical marks on coal mining sites

If there is a land in the S-shaped strip of land that is both rich in resources and steeped in heroic historical marks, it is Quang Ninh . The mining area is not only the cradle of the Vietnamese coal industry, but also a witness to many ups and downs, losses and victories. In this place, the coal mines are not only the places where the black gold of the Fatherland is mined, but also historical milestones, where the names are engraved with the indomitable spirit, discipline and unity of the miners.
Source: https://baoquangninh.vn/dau-an-lich-su-tren-nhung-cong-truong-khai-thac-than-3352479.html