1. Taking bank transfer as an example to explain the specific implementation plan of distributed transactions, the second-stage submission
2. Supplement
After the transaction center receives the pre-submission from Bank A, if it does not receive the notification of the successful deduction in step 6 within a fixed time, it will initiate a poll to check whether the deduction is successful from Bank A. If the deduction fails, the transaction center will delete the deduction. Record, notify the user that the transfer failed