Where can I purchase the Beijing Subway Smart (prepaid) card?

This card is known in Beijing as the Yikatong, although you likely won’t reap the rewards of the discounts on the subway it does give you an immediate discount on the busses. You can purchase the cards at any Beijing subway station directly for a deposit of 20RMB.

NB: For Subway if you spend more than 100 yuan within one month, you will get 20% off any further trips. If more than 150 yuan, you will get 50% off any further trips.