Passengers must insert the ticket or scan the card at the gate both before entering and exiting the station. The subway's fare collection gates accept single-ride tickets and the "Yikatong" fare card. Passengers can purchase tickets and add credit to "Yikatong" card at ticket counters or vending machines in every station. The "Yikatong", also known as Beijing Municipal Administration & Communication Card (BMAC), is an integrated circuit card that stores credit for the subway, urban and suburban buses and e-money for other purchases. The "Yikatong" card itself must be purchased at the ticket counter. To enter a station, the "Yikatong" card must have a minimum balance of ¥3.00.