The function of nfc itself is free. The mobile phone supports nfc function. When this function is enabled and a bank card is associated, you can swipe your card with your mobile phone and complete the transaction on the nfc device.
Use nfc function to recharge the bus card, as shown below:
1, start the NFC function of the mobile phone first. 2. After starting Alipay, click "More", and under the convenience service category, click "City Card". 3. Follow the prompts to put the bus card into the NFC sensing area on the back of the phone. 4. After the mobile phone NFC identifies the bus card, select the amount you want to recharge, and click "Confirm Recharge". 5. After confirming the recharge amount, verify the fingerprint or enter the Alipay payment password.