High-speed trains connect Shanghai with Huaiyangnan (Huaiyang South) using a mix of G-series and D-series services. The quickest itineraries typically pair a G-series high-speed train from Shanghai Hongqiao via Hangzhou East and Hefei South to Fuyang West, then a short hop to Zhoukou East and onward to Huaiyangnan. On the busiest corridors, G-trains operate at 300–350 km/h (186–217 mph), while the regional legs toward Zhoukou East and Huaiyangnan usually run at 200–250 km/h (124–155 mph). With a single change at Fuyang West or Zhoukou East, total travel time is often around 4 hours 45 minutes to 5 hours 30 minutes, depending on stops and connections. By comparison, all-D-series options cover more intermediate stations and are generally slower, taking roughly 5 hours 30 minutes to 6 hours 30 minutes. D-trains cruise at 200–250 km/h (124–155 mph) and may stop at key hubs such as Hefei South, Lu’an, Fuyang West, and Zhoukou East. Both G and D services offer Second Class and First Class seating, with Business Class available on select G-trains. Expect reserved seating, power outlets, and trolley service; G-series is best for the shortest runtimes, while D-series offers broader station coverage and typically lower fares.