CRRC Qingdao Sifang Co Ltd（中车青岛四方机车车辆股份有限公司）is a subsidiary of China's rail giant China Railway Rolling Stock Corporation.

The Qingdao-based railcar-maker is China's industrialization base of manufacturing high-speed trains, the leading enterprise to design and manufacture the top-grade passenger cars, the state-accredited manufacturers of the domestic subway and light rail cars and the important export manufacturing base of the national rail transportation equipment.

As a national high-tech enterprise, the company possesses National Engineering Technology Research Center for High-speed EMU Final Assembly and National Engineering Laboratory for System Integration of High-speed Train, National R&D Center and post-doctoral work stations.