Zheng Hai is promoting energy saving and reduction of polluted discharge. For example, Ningbo Sheng Fa Copper Industrial Co. LTD is busy with the projects on reconstruction of gas generator and recirculating water system. After the completion of two projects, the Corporation can save over 100 tons of oil and implement zero discharge of waster water, which was over 100 tons per day. Other enterprises are doing the same work as well. Therefore, saving energy and reduction of polluted discharge have become a popular practice in Zheng Hai.