CRRC Sifang Co Ltd (中车四方车辆有限公司) is a wholly-owned subsidiary of China's rail giant China Railway Rolling Stock Corporation (CRRC), with a registered capital of 343.1 million yuan (about $54.17 million).

The company has devoted itself to researching, development, manufacturing and serving of railway locomotive and rolling stock products, and has made significant contributions to the technological advancement of the Chinese railway locomotive and rolling stock industry.