The article discusses how land in Tangshan, previously used for iron mining, has been reclaimed to improve the environment. Different methods like ecological agriculture and planting on tailing bins have been used to reclaim over 700 hectares of land. This has led to significant improvements in the eco-environment of the area, with reclamation rates exceeding 80% and reaching a high global standard. The reclaimed land has also brought economic and social benefits to the region.