GreenTech Environmental Co., Ltd. engages in membrane application in advanced water treatment and conversion of sewage water to resources. It provides equipment, technology solutions, operational services, and recycled products to its customers. Its primary activities are advanced treatment of municipal drinking water as well as advanced treatment and utilization of municipal sewage and industrial wastewater. The company was founded by Hui Chun Zhang, Sen Jia, Ji Duan Wu, and Li Jie Zhu on July 8, 2004 and is headquartered in Beijing, China.