1. The advantage of tying etc with a savings card is that you can deduct your money at a high speed without running for repayment, but you need to run an electronic account to deposit money, otherwise you won't be able to cross the expressway if the amount is not enough, because you can't deduct money without money.

2. the advantage of binding etc with credit card (debit card) is that you don't need to deposit. As long as there is money in the credit card (credit card), you can deduct the fee, and if there is no money, you can deposit money directly into the card. The disadvantage is that the high-speed fee is deducted from the credit card. Failure to repay in time will affect credit and will also result in penalty interest.