The high-speed rail C seat is near the middle corridor. Seats a and F at both ends of each row of seats are near the window. The passenger space inside the train is aviation. In addition to numbers, English letters are added to the seat number. Each row of second-class seats is equipped with five seats arranged in a 3 + 2 mode, represented by a, B, C, D and F.
High speed railway, referred to as high-speed railway for short, refers to the railway system with high design standard and can be used for safe and high-speed running of trains. Its concept is not limited to track, let alone train. High speed rail has different regulations in different countries, different times and different scientific research and academic fields. In the code for design of high speed railway issued by the State Railway Administration of China, high speed railway is defined as a new passenger dedicated railway with a design speed of 250 km (inclusive) to 350 km (inclusive) and a standard gauge for running EMU trains.
By the end of 2019, the operating mileage of China's railways will reach more than 139000 kilometers, including 35000 kilometers of high-speed railways. On October 21, 2020, the 400 km / h transnational interconnection high-speed EMU, a key special project of rail transit, was offline in CRRC Changchun rail car Co., Ltd. The first formal high-speed railway system in the world is Japan's Tokaido Shinkansen, which was completed and opened to traffic in 1964, connecting the three metropolitan areas of Japan where Tokyo, Nagoya and Osaka are located, and promoting Japan's high-speed development.