Under normal circumstances, if your credit card is used normally and frequently, and there is an opportunity to increase your credit limit after a certain time interval (usually half a year), some banks will automatically increase your credit limit.

As for whether the credit card can be renewed when it expires, it is still uncertain. Usually, as long as the credit card is used normally and there is no bad record, it will be renewed automatically, and you will get a new card before the card expires, and the amount of renewal may not be adjustable.

Of course, some bank credit cards require cardholders to take the initiative to apply for card replacement, and may need to call customer service or go to the bank counter to apply. If this is the case, you can apply for withdrawal by the way. If the incoming credit card is in good condition and the limit is not raised within six months, it should be successful.