The 250km/h stainless-steel bodied trains are specially designed for overnight services and are fitted with sleeping berths. Manufacture of the 430m-long trains will take place at BST's production facility in Qingdao, China and the sets will be powered by Bombardier's Mitrac propulsion system, supplied by Bombardier's CPC Propulsion System subsidiary.

A prototype of the train presented to CRC in July included 532 soft-class berths and 110 second-class seats. The prototype was intended to gauge reaction to the overnight concept which CRC hopes will help it make better use of the high-speed network for passengers who face long journeys due to the great distances between cities.