Founded in 2014, Qingyan Environmental Technology Co., Ltd. (stock code: 301288) is a national high-tech enterprise located in Shenzhen, China. The company provides new and unique products in wastewater treatment sector. The  company developed RPIR rapid biochemical wastewater treatment technolgy which can greatly save land use, investment and operational cost compared to conventional process.  The Company has become a leader in the reform of equipped innovative technology for sewage treatment and achieved rapid development. Total treatment capacity of wastwater treatment plants using RPIR process has reached 3 million tons/d.