In the field of energy conservation and environmental protection, in 2012, based on a series of technological inventions developed by Professor Wang Lei's team for the preparation of high-performance anti-pollution PVDF hollow fiber ultrafiltration/microfiltration membranes, Suzhou DOYUM Environmental Technology Co., Ltd. was established, and an annual production line of 3 million square meters of hollow fiber ultrafiltration/microfiltration membranes was constructed, achieving complete production of membrane components. The company mainly engages in the field of environmental protection, and is applied in sewage regeneration In the engineering of water supply treatment and industrial circulating water treatment, the annual output value is nearly 100 million RMB.