Credit cards are swiped abroad through VISA or MASTER system, and there is no password confirmation. It is also an industry practice to need credit card confirmation when checking in. Password confirmation is a unique UnionPay system in China. If extra money is deducted from your credit card, please make sure that the amount shown on the accommodation confirmation form signed when you leave the hotel is the same. If you overcharge, you can give feedback through the hotel reservation website. Generally, foreign hotel reservations are large websites, so this problem can be solved in time, unless you are not using a large reservation website. Going abroad is often booked online, which rarely happens.