The wagon is used for transporting containers, two 20ft containers with external dimensions conforming to ISO668 can be shipped simultaneously or one 20ft or 40ft containers can be loaded on the middle of the vehicle separately.The wagon is mainly composed of chassis, container locking device, braking device, coupler buffer device and bogie. The base frame is all-steel welded structure and is mainly welded by end beams, center beams, side beams, bolster beams, beams and small beams, and steel floors.