Initially constructed in 1994, Yantai Vast Co., Ltd. is held by China Energy Conservation Investment Corporation with Hong Kong Zhongyi in Group as a shareholder. The total assets of the company is RMB 140 million, with fixed assets of RMB110 million. The workshop covers an area of 100 thousand m2, including building area of 13 thousand m2. The company now has 450 staffs among whom, the staffs with college certificates or above reach 59% of the whole staffs.　Imported international advanced machining equipment and inspection instruments from England, Switzerland, Italy and Germany, the company purchased Cromard know-how and full automatic plating plants from Laystall Engineering Co., Ltd, England which represents advanced world level in the 90s to produce first-rate thin-wall chrome-plated steel cylinder liners which can meet high performance requirements of various kinds of auto and turbo charged engines. The product quality has reached the world top level through unremitting digestion, absorption, improvement and innovation, especially wear resistance and matching property rank first in the world. The company was evaluated as “High-tech Enterprise” by Scientific and Technical Department of Shandong Province in 2002.The company has supplied liners for main engine manufactories successively such as Jiang Ling Group, Beiqi Futian Co., Ltd., Dongfeng Chaoyang Diesel Engine Corporation, and Baoding Great Wall Internal Combustion Engine Corporation etc. replacing the import. And it has provided samples for over 10 main engine manufactories such as Qingling Group, Yuchai Group, Changchai Group, and Yiqi Wuxi Diesel Engine Factory etc. On the maintenance market, the products cover all inland provinces, and the domestic market share is over 72%. The products have been evaluated successively as “State-grade New Product”, “China Technological Excellent Product and “Shandong Famous Brand Product”, and evaluated as “Excellent Supplier” by JIangling Group and Dongfeng Chaoyang Diesel Engine Corporation etc.