The first DES-25B coach was designed for mass transportation in 1992. They are able to running up to 140 km/h and most of them use normally ventilating. The life time is 30 years.

The coaches adopt 209P or 209T bogies, disc brake, type J brake shoe adjustor, 104 integrated electro-pneumatic brake units, anti-skid device, etc. Power supply is 48V battery and axle driven 5 kW generators. There are commodious berths, seats and stylish ceiling lights inside coaches so that people feel comfortable and cheer in journey.