The company carries out duties to protect environment, with investment of more than RMB 50 million Yuan to build environment protection facilities. Collaborately with Shanghai Municipal Environment Science Institute, the company researched and built wastewater containing cyanogen circulating treatment system has reached top of domestic level. After treatment, the wastewater can be collected and used again. It realizes zero discharge of wastewater containing cyanogen. After pretreatment of other wastewater, water quality can reach third level of standard (Shanghai Municipal Wastewater Discharge Standard). Part of treated water can be used again. The rest can reach requirement of standard, and discharged into municipal wastewater treatment system.