My credit card was charged more than 400 yuan for no reason. How can I check it? Call the bank ?

Check if you have booked a non-cancellable room. Some hotels will charge the room fee in advance.

It may be a authorization from the hotel. Check if there is any advance notice in the hotel order.

Could it be that the free cancellation deadline for the hotel you booked has passed and the room deposit has been deducted in advance?

Some hotels have advance payment, they will deduct part of the room fee in advance. You should first check if there are any hotels you have booked that require on-site payment for room fees that have not been paid. Some hotels will deduct part of the payment in advance. This is what some of my friends who have been there said. If this is not the reason, you should check it as soon as possible.

Is the deposit for ordering a car required to be paid in advance?

Hurry up and call the bank.