It is obvious that the CCB card costs more than 20 yuan. How can it be possible to receive text messages for only a few dollars?

There is probably a discount or cash back. Obviously, it took more than 20 yuan to build a card, and it took only a few dollars to receive a text message. It is very likely that you will cooperate with the merchants and then use the CCB card to spend at the designated merchants, so there will be certain discounts, reductions and exemptions, and there may also be cashback discounts for consumption categories, so the deduction will be less than the actual amount. Before handling the CCB card, you must know the specific preferential measures and pay attention to the daily consumption. You can open the text message to remind you.