Hello, I'd like to ask, why do I brush the pre-authorization for the customer and brush the SMS received by 600 yuan?

You freeze the money in the customer's card.

Only when the customer completes the pre-authorized consumption can the customer receive the pre-authorized consumption.

This may have been consumed by customers in other places.

But there is no information if you pre-authorize by swiping 600.

If received

This 90% is over 10% in advance.