Guangzhou Science and Technology Plan Project Project Name: Development and Demonstration of Remediation Technology for Cadmium/Lead Contaminated Farmland Project introduction: The company and the South China Botanical Garden jointly developed heavy metal soil remediation technology, developed new passivation/stabilization materials and screened and cultivated the super-accumulating plant Amaranth for the remediation of farmland around the lead-zinc mine smelter in Renhua County.