Tianjin Zhonggang Shuangying Filter Co. Ltd.is an integrative enterprise of gathering with the technical development, production and sales marketing, which open a branch company specializing in the production of filters. It is located in the triangle area of Beijing, Tianjin and Tangshan in Beichen Industrial Park, enjoying the beautiful lucky land and sharing the convenient traffic. The company covers an area of 20000 square meters including 15000 square meters of the building area, with total assets of RMB3 million. It currently has 200 empoyees, including 20 technical and management personnel and accountants.