Nanjing has a very small bus card. What card is it?

It seems to be a new product of China Telecom, which is the result of God's will. It has a mobile phone battery-sized card and a mobile phone card, which can be used as a monthly pass. You can also use your credit card to go shopping in suguo supermarket, and then put it on your mobile phone to make a phone call. Now is the promotion stage. Tianyi mobile phone needs to change any card for free. If you have an E9 package at home, Tianyi mobile phone will be replaced for free. Telecom will also help you cash 50 yuan money in your new card.