How long is the Shanghai-Nanjing high-speed railway? It is better to say the length of a paragraph and the total length.

I think you're asking about the length of the high-speed rail. Most of the trains running on Shanghai-Nanjing are CRH2 cars with a speed of 300 kilometers per hour. This train consists of 8 carriages, with the middle carriage 25 meters long, the first carriages at both ends 25.7 meters long and the total length of the train 20 1.4 meters.

I hope it helps.