Shandong Laizhou Jinquan Rocker Arm Co., Ltd.  is a comprehensive private shareholding enterprise engaged in scientific research, manufacture, exportation and trade. And the company is also one of the largest professional production bases for gas engine valve rocker arm in China. The company was founded in 1952, and now it has 600 workers, and covers 40,000 square meters, and has total assets more than 100,000,000 RMB. The company also has more than 100 intermediate and senior technicians. And it was approved as imp & exenterprise by the Ministry of Foreign Trade.

The main products of the company are various kinds of gas engine valve rocker arm; it has an annual output 5,000,000 pieces for rocker arm and 600,000 sets for assemblies. The company passed the ISO/TS16949 quality management system certificate in 2004.

Shandong Laizhou Jinquan Rocker Arm Co., Ltd. is the main supplier for China No. 1 Auto Group: Wuxi Diesel Engine Shareholding Co., Ltd and Dalian Diesel Engine Shareholding Co., Ltd, China No. 1 Auto Group: Dongfeng Chaoyang Diesel Engine Co., Ltd, Weichai Dongli Shareholding Co., Ltd, Shanghai Diesel Engine Shareholding Co., Ltd, Guangxi Yuchai Machine Shareholding Co., Ltd, Guangxi Yuchai Machine Shareholding Co., Ltd, Changchai Diesel Engine Shareholding Co., Ltd, Anhui Quanchai Shareholding Co., Ltd and Doosan Infracore Co., Ltd. The products are also exported to many countries and areas of Europe, America and South-east Asia.