On the Beijing to Xi'an corridor the main services are high-speed G-series trains and slightly slower D-series EMUs; there are also conventional overnight Z/T sleeper trains for travelers needing a berth. Most high-speed services run between Beijing West (北京西) and Xi'an North (西安北) and call at major intermediate hubs such as Zhengzhou East (郑州东) and Luoyang Longmen (洛阳龙门) on some runs. G‑series high-speed trains (CR400 'Fuxing' and CRH380 sets): top commercial speeds up to 350 km/h (217 mph). Fastest G services cover the route in roughly 4.5–6 hours depending on the specific train and number of stops; these sets offer Business, First and Second class seating, onboard power outlets, luggage racks, trolley service or a dining car on longer runs, and are designed for sustained 300–350 km/h operation. D‑series EMUs (older CRH variants): typical operating speeds up to about 250 km/h (155 mph). D trains on this route take longer—commonly around 6.5–9 hours—because they make more intermediate stops and may run on sections with lower speed limits. Seating is usually First and Second class; onboard services are similar but trains may be older and slightly slower overall. Conventional sleeper trains (Z/T overnight expresses): maximum speeds generally in the 120–160 km/h range (75–99 mph) on conventional lines. These overnight options take roughly 11–14 hours and provide soft and hard sleeper berths, useful when travel during the night is preferred or when avoiding daytime transfers. Frequency and choice: dozens of high-speed departures operate daily, so travelers can choose the fastest G trains for the shortest journey time, D‑series for lower fares and additional stops, or Z/T sleepers when a night berth is required. All services serve the Beijing–Xi'an corridor but differ in travel time, onboard classes and stopping pattern.