The Beijing Subway is the world's busiest rapid transit rail network in annual ridership that serves the city of Beijing, China. It began operation in October 1969, and the current number of lines is 22, and the total amount of stations is over 300.
Fares in the Beijing Subway are distance-based. Common single tickets are sold at the TVMs and ticket offices. All-purpose cards are sold at all stations. 20 yuan deposit shall be paid for the card.