Aiming at the difficult problem of metal wastewater treatment in electroplating surface treatment industry and circuit board industry in China, GSA finally succeeded in applying gsa-cws-water technology to electroplating enterprises and textile enterprises and completely adsorbed the metal content in WATER body through more than ten years of efforts. At present, this process has been successfully applied to the circuit board and electroplating plants in east China. The use of chemical catalytic - displacement principle of reduction reaction process has become the present the best choice for all metal surface processing enterprises, the safe and reliable technology, low operating cost, energy conservation and emissions, really meet the national strategic target of sustainable development, recommend it to all the metal surface electroplating, PCB, and processing enterprises.