D-series trains
D-series trains trains are a type of train service offered by China Railway. They are further divided into two types: One type is an electric multiple unit EMU train that runs on high-speed or rapid railways. These trains are numbered D9XX and D plus four digits, with a maximum operating speed of and make more stops than G-series trains. The other type runs on classic rails and is operated by CR200J EMUs as a replacement for traditional trains. These have a maximum operating speed of, the same as Z-series trains, and are numbered D1 to D899.