Beijing–Shanghai High-Speed Railway
Some longer routes change from being an "up service" to a "down service", or vice versa, mid-route, with more than one reversal being possible on the same route. In this case, the train would have two designations. For example, the G1202 and G1205 both refer to the same train from Harbin to Shanghai. From Harbin as far as Tianjin West Railway Station, the service is the G1202 "up service" traveling in the "up-direction" of the Beijing–Harbin High-Speed Railway towards Beijing, but after Tianjin West the train begins traveling away from Beijing down the Beijing–Shanghai High-Speed Railway towards Shanghai, becoming the G1205 in the process. Note: this is not to be confused with the G1208/G1205 from Qingdao to Harbin, which also switches at Tianjin West.