Kunshan Hengqing Purification Equipment Technology Co., Ltd. is a high-tech enterprise, a private technology enterprise in Jiangsu Province, and a professional air filter manufacturer listed in Jiangsu Equity Trading Center. The company has a municipal R&D center and a wholly-owned subsidiary, Anhui Spade Clean Technology Co., Ltd., which covers an area of 30 mu. It is the first clean room production environment in the industry. The company has 150 employees, more than 50 with various professional and technical titles, including 10 medium and senior technicians. The company has 3 production lines without diaphragms, 1 production line without diaphragms for high temperature resistance, and 8 production lines with diaphragms.