Shandong Yongjin Transmission Machinery Co., Ltd., founded in 1993, is a production base for rear suspension systems of vehicles such as medium, heavy, mining, and cranes in China. It is also a professional manufacturer of engineering machinery shafts and reducers. The company produces 150000 sets of suspension products annually, including 50000 tons of cast iron and cast steel products, as well as more than 200 professional equipment such as CNC machining and heat treatment. It also has comprehensive laboratories for physical and chemical analysis, metallographic testing, mechanical performance, fatigue testing, and flaw detection, as well as complete monitoring and inspection equipment such as coordinate measuring instruments.

The company is a technology-based enterprise that integrates product research and development, production, and sales in the production and manufacturing of rear suspension systems, located in Penglai Economic Development Zone, Yantai City. Has successively passed certifications in international quality management systems such as ISO9001: 2000, ISO/TS16949: 2009, IATF16949, international automotive quality management systems, and environmental/occupational health and safety management systems.

To meet the needs of domestic and international markets, the company will continue to increase technological transformation and adopt a development strategy of domestic and global perspective through introduction, digestion, absorption, and innovation. It will build a modern research and manufacturing base for rear suspension systems of large vehicles, and provide users with reliable and efficient products with a more pragmatic work attitude. The company will continue to adhere to the philosophy of "people-oriented, technological innovation, user first, and pursuit of excellence", and is willing to cooperate sincerely with new and old friends at home and abroad to create brilliance together!