After taking the subway, China UnionPay Express showed that the CCB card had been deducted, but the book amount was not small.

Because there is a certain time difference between the payment result of China UnionPay Express client and the accounting settlement data of the banking system. Under normal circumstances, the subway gate will be deducted immediately after passing, and the corresponding order will be generated in the banking system to complete the settlement. However, due to the delay of the bank's account settlement system and the time difference between the China UnionPay Express client and the banking system, the balance on your book will not change for the time being.

I suggest you wait a while and check your account balance again. If there are still problems, please consult your customer service or China UnionPay Express Customer Service Center to verify the order information and account balance, so as to solve the problem. There is no mistake in the current online payment system. Generally speaking, just wait a little.