Nowadays, an industrial system enjoying such characteristics as “of some scale, perfect processing means, scientific management and advanced technology” has been set up. The number of Machining and Metal products Enterprises of large scale has amounted to 86, such as Yantai Tri-circle Group Rushan Double-Link Co., Ltd, Rushan Lijiu Special Motors Co., Ltd, Shandong Yulong Vehicle Co., Ltd, etc. Moreover, such leading products as semi-metal brakes for automobiles, braking device, copper and iron padlocks, electrical motor, connecting rod, enjoy great popularity at home and abroad. Up to now, three of those above-mentioned have passed SO/TS16949 AUTHENTICATION.