High-speed G- and D-series trains connect Shanghai with Nanyangdong (Nanyang East), typically with one change at Zhengzhou East. G-series Fuxing (CR400AF/BF) offer Second, First, and Business Class seating, while D-series Harmony (CRH) generally provide Second and First Class. The fastest option uses G-series Fuxing from Shanghai Hongqiao to Zhengzhou East via the Beijing–Shanghai and Xuzhou–Zhengzhou high-speed corridors, operating at up to 350 km/h (217 mph). From Zhengzhou East to Nanyangdong, G trains on the Zhengzhou–Chongqing high-speed line usually run at 300–350 km/h (186–217 mph). End-to-end travel time is about 5–6 hours, with limited stops at major hubs such as Suzhou, Nanjing South, Xuzhou East, and Zhengzhou East. In comparison, itineraries that include D-series Harmony segments (200–250 km/h; 124–155 mph) take around 6.5–8 hours due to lower top speeds and more intermediate stops. Both services provide reserved seating, power outlets, ample luggage space, and trolley catering. Choose a G-series Fuxing for the shortest journey and access to Business Class on many departures; D-series is suitable for lower fares or reaching additional regional stations. Note: conventional Z/T/K trains serve Nanyang main station, not Nanyangdong.