On May 14, 2019, Shandong Longde Composite Materials Technology Co., Ltd. and Germany Mann Hummer Group jointly signed a strategic cooperation agreement at the headquarters of the German group, establishing a long-term partnership for cooperation and development.

Mann Hummer Group is the world's largest filter manufacturer with an annual sales revenue of 30 billion RMB. Their main customers are world-renowned brands such as BMW, Mercedes Benz, Volkswagen, General Motors, Ford, Nissan, Peugeot, etc.

Shandong Longde Composite Materials Technology Co., Ltd., as a large backbone enterprise in the production of industrial filter paper in China, has introduced world-leading German manufacturing equipment and production process technology. It is currently the largest single machine production capacity, widest paper width, most advanced equipment level, best product quality, and largest market share production manufacturer of similar production lines in China.

The signing of the agreement between the two parties has promoted the improvement of product grade, enhanced market competitiveness, and laid a solid foundation for improving the reputation of the enterprise and promoting its development.