How to keep World of Warcraft secret?

/Mi Bao Card/

Actually, it's clearly written on the website.

Enter your email here.

Write down the secret when it comes out, preferably by hand. Don't put secrets in the computer.

Then go to your email website and open the email. Make sure the secret record is correct. You'd better delete the secret.

Adding a new version of World of Warcraft Cheat Card is binding.

Enter your serial number (not to mention that you didn't remember the serial number when you got the secret card online). There are three numbers on the secret card.

Then click "Add New World of Warcraft Cheat Card".