Shandong Longde Composite Fiber Technology Co., Ltd. is the holding company of Shandong Wanhao Paper Group. It was established in 2012 with a registered capital of 53.1 million yuan. It is located in Shandong Linqu Economic Development Zone and covers an area of 260 mu. It is based on industrial filter materials. It is a national high-tech enterprise integrating scientific research, development and production. It is a national specialization and new "little giant" enterprise. It has "Automotive Filter Paper Shandong Engineering Research Center", "Shandong Province One Enterprise One Technology R&D Center", "Shandong Provincial Industrial Design Center" and other research and development platforms, are the governing units of the Automotive Filter Committee of the China Association of Automobile Manufacturers and the Filter Branch of the China Internal Combustion Engine Industry Association. The company has passed the IATF16949 international auto parts quality management system certification, and is listed in Shandong Property Rights Exchange Center (abbreviation: Longde Technology, stock code 300239).

Longde Company, as a large-scale backbone enterprise producing filter paper for the automobile industry in China, has introduced world-leading German manufacturing equipment and production technology. It has the largest single-machine capacity, the widest paper width, and the highest equipment level in the same industry in China. The base paper production line is equipped with the most advanced inclined wire former and hot air penetrating drying system. The coating production line adopts the world-leading German VITS (VITS) coating machine, and introduces the waste gas treatment and heat recovery system manufactured by the German WK company, and achieved green environmental protection, energy saving and emission reduction. The production line is equipped with on-line detection devices for quantification, moisture, and paper defects. At the same time, the detection and experimental facilities are complete. It has the most advanced German GMN multi pass test bench, German TOPAS test bench, American Atlas (ATLAS) air permeability meter, German TOPAS aperture meter, and has advanced raw materials and finished product testing and analysis constant temperature and humidity laboratories, which provides a reliable guarantee for product quality compliance, stability and consistency, and ensures the first-class quality of the product.

Longde Company has always adhered to the development concept of "to be high-tech, to be the first in the industry" and the business philosophy of "quality first, reputation first, and to reduce customer risk to zero", and has always aimed at the technology frontier of international automotive filter paper, relying on the group's mature management system and experienced technology research and development team, relying on high-end first-class production equipment, advanced production technology and perfect testing equipment, adhering to the tradition and being brave in innovation, strive to build Chinese national brand and provide high-quality industrial filter products and service to domestic and foreign customers.