Souvenir bus tickets. [Photo/Beijing Public Transportation Group]

Limited edition souvenir bus tickets have gone on sale in Beijing.

They are to mark the Chinese traditional "Xiao Nian" festival, which falls on the 23rd of the twelfth month of the lunar year, and are being sold by Beijing Public Transportation Group.

As 2016 marks the Year of the Monkey, according to the Chinese zodiac, the special edition souvenir tickets are themed with monkeys and the lunar New Year.

Each souvenir ticket costs 2 yuan. Passengers pay in cash, as the tickets are only available on buses with buses conductors.