DACC has formed a complete domestic sales network with products spreading over 18 railway bureaus, 15 freight car builders and rebuilders. Wheels that have been serviced in China state railway include HDZA, HDZB, HDZC of 21-ton axle load, HEZ, HEZB of 25-ton axle load. In addition to perfecting the old products, in 2006, DACC developed HDZD wheels for 21-ton axle load, HEZD for 25-ton axle load, HEZE, HFZ for 27-ton and 30-ton axle load. Over the years, DACC has been continuously enforcing technology renovation, exerting efforts to improve research and development skill. Cast steel wheels are continuing developing towards newer and wider technical arena.