This plot was originally a production factory of zinc-manganese dry batteries of Ningbo Shuanglu Holding Group Co., Ltd. The plot is contaminated by heavy metals such as cadmium, nickel and manganese. The volume of contaminated earth is 18,000 cubic meters and the maximum contamination depth reaches 6.6 meters. The coordinated disposal technology of industrial kilns is used for remediation to meet the requirements of the second-class planned land use.