To log out by text message, use the mobile phone notified by text message to edit the "last four digits of the QXTZ# account" and send it to 95533;
To log out by phone, you can use mobile banking or dial 95533 Log out;
If you have opened online banking, you can cancel the SMS service function through online banking.
Extended information: Online banking logout:
Enter the account, login password and verification code to log in to online banking;
After successful login, click "Security Center" ;
Click "SMS Service", select SMS verification service, and then select Cancel.
Reference: China Construction Bank official website