Upgrading your platinum card may mean that you have more savings. Platinum card, the original card can still be used. The amount of platinum card can only be said to be not lower than the original card, which may be higher than the original card or the same as the original card.

The two cards share the maximum limit, that is, if the original card limit is 20,000 and the platinum card limit is 30,000, then the total amount of the two cards is 30,000 yuan instead of 50,000 yuan. If the original card costs 20,000 yuan, even if the platinum card costs 30,000 yuan, it can only consume 1 10,000 yuan.

However, there should be an annual fee for platinum cards, and now there are many activities in platinum cards to offset the annual fee with points. If you upgrade, don't use the original one. Specifically, the bank shall prevail. The limit is the bank's decision, as well as your own credit information.