Kunshan Hengqing Purification Equipment Technology Co., Ltd. is a professional air filter manufacturer that integrates the qualifications of a national high-tech enterprise and a private technology enterprise in Jiangsu Province, and is listed on the Jiangsu Equity Exchange. Its wholly-owned subsidiary, Anhui Spade Clean Technology Co., Ltd., covers an area of 30 acres and boasts a production environment with a thousand-level clean room.