Back to the question, how to find the preferential merchants of these bank credit cards. General preferential merchants can be found in banks in official website, such as China CITIC Bank. After entering official website, click on the credit card to find the preferential merchants. After entering, choose the city category according to the prompt, and you can find the preferential merchants of credit cards.
In addition, there is a more convenient method. There is a mobile phone application called Friends. You can know which credit card of the merchant has what kind of discount by searching the merchant, or you can directly search a bank to find the preferential information of the bank's credit card. Personally, I think it is quite useful, and I hope it can help you.