Jingjin Filter Press Group Co., Ltd. is a national crownless large-scale modern filter press professional production group integrating five subsidiaries, namely, Hebei Jingjin Filter Press Co., Ltd., Dezhou Damei Separation Machinery Co., Ltd., Dezhou Damei Filter Cloth Co., Ltd., Dezhou Jingjin Machinery Installation Co., Ltd., and Dezhou Jingjin Machinery Parts Co., Ltd.

Zhenda Group, as the supplier of Bus duct and bridge products for the project, started in 1999 and is a modern enterprise focusing on the design, research and development, production, sales and service of Bus duct, cable bridge, distribution cabinet, seismic support and hanger products. The company's products are widely used in data communication, energy and chemical engineering, research and development and manufacturing, power grid, commercial, residential, cultural and tourism, municipal public construction, warehousing and logistics, education and treatment projects.