High-speed G-series trains on the Shanghai to Changzhidong route offer Second, First, and Business Class seating. The fastest itineraries usually involve a single change at Zhengzhou East and use CR400/CRH380 Fuxing or Hexie EMUs, running up to 350 km/h (217 mph) on the Shanghai–Nanjing–Xuzhou–Zhengzhou corridor, then 200–250 km/h (124–155 mph) from Zhengzhou via Jiaozuo and Jincheng East to Changzhidong. Typical travel time is about 5 hours 30 minutes to 6 hours 30 minutes, depending on stops at key stations such as Nanjing South, Xuzhou East, Shangqiu, and Jiaozuo. By comparison, conventional T/Z/K overnight trains on this corridor (often calling at Changzhi rather than Changzhidong) operate on legacy lines with maximum speeds around 120–160 km/h (75–99 mph) and lower averages, taking roughly 15–20 hours. These services provide Hard/Soft Sleeper berths and seats, while G-series trains add power outlets, modern restrooms, and, in Business Class, lie-flat seating. Direct high-speed departures may appear on some dates, but most journeys are fastest with one transfer at Zhengzhou East.