Beijing's subway has for the first time introduced carriages of different temperatures on the same train, said Beijing Subway on Thursday.

The subway's line six has since June 17 begun to introduce different temperatures throughout its trains. On line six's trains, the first 16 carriages are cold while the last 16 carts are warm, the subway company said, adding that the average temperature in the colder carts is around 25 C.

Passengers can now choose carriages based on their favored temperature, and 34 subway stations along line six now send out temperature reminders for passengers.