1, when buying a wallet, there are usually small hard cards from several brands. Don't throw them away! When playing cards, except that the cards can't be on the same interlayer, put a card of this kind on the side with magnetic stripe to play the role of spacing.
2. ICBC has a special bank card holder, which works well and can be used many times.
3. It's not bad to use ID card as the interval.
I have used all three methods now. I have four bank cards in one wallet, and it has been no problem for several months. You know, I used to degauss three cards a week, so it doesn't matter if I spend a little money to make up for it. I can't spare that time! It depends on the face of the bank staff!
If that friend has a better idea, post it and let's communicate.
Finally, it should be noted that the bank card must not be put in the pocket directly with the mobile phone, so it is likely to be degaussed soon! ! !