The bearings, the important and critical basic components in the equipment manufacturing industry, directly determine the performance, quality and reliability of the major equipments and the host products, known as the "heart" components of the equipment manufacturing. After years of development, China's bearing industry has formed a considerable scale and the output of the national bearing industry in 2010 was about 130 billion yuan, ranking in the third place in the world. Although the scale of the development of China's bearing industry is very large, most of them concentrate in the low-end, while in the field of high-end bearing manufacture, there is still a considerable gap between China and the developed countries. Wang Quanqing, the General Secretary of China Bearing Industry Association, has made ​​it clear that the development pace of China's high-end bearings cannot keep up with the development pace of the hosts. For example, China has mastered the independent intellectual property rights of the high-speed multiple unit train technology, but the accompanying bearings are still basically dependent on imports.