How does the "two-dimensional code cash withdrawal" of Bank of Communications operate?

There are two steps: 1. Reservation for withdrawal: the customer selects the withdrawal card number, fills in the withdrawal amount, enters the SMS dynamic password, and then clicks "Reservation", and the page prompts "QR code withdrawal reservation is successful!" (D-code withdrawal reservation is only valid before 24: 00 on the same day); 2. Take code and withdraw money: Click "Take code and withdraw money" to enter the QR code shooting page (no need to log in at this time). Customers who have operated the QR code withdrawal reservation can successfully scan the QR code on the self-service device. At this time, the mobile banking page prompts "QR code scanning has been successful. Please return to the self-service device to continue. , click the "OK" button on the self-service device to jump to the page where the transaction password is entered to complete the withdrawal.