China thumb|right|CJ5 (DEMU) used by the Xi'an–Huyi railway On 14 January 2014, CRRC Changchun Railway Vehicles announced that hybrid electric multiple units were put into production. At the end of 2014, the first batch of hybrid EMUs, one train each with battery-catenary power supply (EEMU) and catenary power supply-internal combustion engine (DEMU), rolled off the assembly line in Changchun. From 2016 to 2020, the vehicles were tested in Hohhot and Beijing Academy of Railway Sciences.
china thumb|right|cj5 (demu) used by the xi'an–huyi railway on 14 january 2014 crrc changchun railway vehicles announced that hybrid electric multiple units were put into production at the end of 2014 the first batch of hybrid emus one train each with battery-catenary power supply (eemu) and catenary power supply-internal combustion engine (demu) rolled off the assembly line in changchun from 2016 to 2020 the vehicles were tested in hohhot and beijing academy of railway sciences