Yes, you can. Indeed, the credit cards held by the same cardholder in China Merchants Bank are actually shared in terms of quota, and the basic functions of credit cards are not much different. The annual fee is calculated separately, so if you only need the function of one credit card, you can only open one credit card. As long as another credit card is not activated, there will be no charge. If you decide not to use it, it is recommended to cancel it directly, because the inactive card may also bring risks to the cardholder, so you can cancel it directly without affecting another card.