Suzhou national cleaner technology ltd. (hereinafter referred to as the state corporation). Established at the end of 2015, the main ffu wind engine module, high-efficiency high-efficiency air filters and high-efficiency vents in junior high schools. National companies have been certified as quality management systems, environmental management systems, european union ce certification and ul certification in the united states, and have more than 50 domestic and foreign patents, with the title “high-technology enterprises”。