If you can use a bank card, you can enter the transaction. Fund companies directly sell funds, and the subscription fee discount can reach 0.4%.
In fact, you don't buy a fund directly with a credit card, but with your credit. In other words, if you usually spend 3000 yuan a month (of course, this amount can't exceed your ability to pay), then when your salary is paid, you can buy it all as a profit; Use a credit card to overdraw when spending money. You can redeem part of it when you want to pay back the money next month, so you can earn the difference and earn points and points by the way!
If you have other specific questions, I suggest you call the customer service staff of the bank, hoping to help you.