The first time is to swipe the pre-authorization of your credit card. Pre-authorization means that the hotel freezes a sum of money in your credit card through UnionPay. This money cannot be used by the hotel or the guest temporarily. For example, if you swipe the pre-authorization A deposit of 1,000 yuan was authorized. The second time is to swipe your credit card for pre-authorization, which means the hotel will get the amount of consumption from your pre-authorization, and the balance will be returned to your account. For example, the hotel got 268 yuan from you through pre-authorization. The remaining 732 yuan will be returned to your account immediately.

I am the front desk of Zhengzhou Qunying Star Hotel, and we all do this.