The photo, taken on July 17, shows passengers walking into a less cold (warm) carriage with a sign reading “different temperatures on the same train” on it, at Changsha Metro Line 1 Hunan Provincial Government Station. (Photo/Guo Liliang, Hunan Daily)
Recently, as the temperature rises, the Metro Line 1 has introduced different temperatures on the same train. Carriages are divided into “cold” and “warm”. Passengers can choose carriages based on their favored temperature.