China Railway runs high-speed services on the Shanghai to Haian route using D- and C-series EMUs (CRH/Fuxing), typically offering Second Class and First Class seating, with Business Class available on select sets. The fastest option uses the Shanghai Hongqiao–Suzhou–Nantong corridor, crossing the Hutong Yangtze River Bridge and continuing to Haian at up to 200–250 km/h (124–155 mph); most timetables take about 2 hours to 2 hours 20 minutes, often with a straightforward same-station change at Nantong. In comparison, conventional K/Z trains on the older line operate at 120–160 km/h (75–99 mph) and require roughly 4 to 5.5 hours due to frequent intermediate stops. High-speed trains are modern EMUs with reserved seating, air-conditioning, power outlets, clean restrooms, and luggage racks; they stop at key hubs such as Shanghai Hongqiao and Nantong before reaching Haian. Traditional services offer simpler onboard facilities and, on some long-distance runs, sleeper cars; they suit travelers prioritizing lower fares or late-night departures, while the D/C services provide the quickest way to cover this route.