Zhejiang Shangfeng Gaoke Zhuanfeng Industrial (浙江上风高科专风实业股份有限公司) grew out of the Shangyu Fan Factory, founded in 1974. It merged with Shangyu Special Fan in 2013 and took its current name in 2015. Under the Shangfeng and Zhuanfeng brands it makes axial, centrifugal, cabinet, mixed-flow and tunnel fans, air-handling units, and air valves including smoke exhaust valves and fire dampers. These products serve nuclear power, rail transit and building projects. Its fire dampers and smoke exhaust fire dampers hold fire product certifications 5982021ZY060032 and 5982021ZY060033 from the Tianjin Fire Research Institute of the Ministry of Emergency Management.