1. Online banking cannot be opened directly with a Great Wall credit card. You can only open it with a debit card, and then bind the Great Wall credit card to it.

2. When you say supplementary card, do you mean supplementary card? If so, there will be an annual fee, but if you consume 5 times in a year with no limit on the amount, the annual fee will be waived, so if you use it frequently, it can be regarded as no annual fee.