G-series trains (Chinese: 高速动车组列车) are the fastest train services of China Railway.The trains usually run on dedicated high-speed railways with a designed top speed of 350 km/h (217 mph).The prefix "G" is pronounced as Gao in the CR system, which is short for Gaosu Dongche meaning high-speed EMUs in Chinese.Compared with D-series trains, G-series trains are operated at higher speeds for either part or whole of the journey, and if compared to the D trains sharing the route, may have fewer stops and even overtake these D trains by giving the latter a longer stay at some stations.The G-series trains often use EMUs with a designed speed of 300 kilometres per hour (190 mph) or higher, covering both Hexie (CRH series) and the Fuxing (CR series).