When I install the system, I enter the root password straight through but what's wrong

The password is too simple or inconsistent. You are advised to enter letters, special characters, and digits, and check whether the password is correct.
If you have any questions, please continue to contact me. If not, please provide screenshot.

Cause: The password is not secure enough.
CentOS7
① Contains at least 8 characters
② The new password must contain at least one lowercase character
③ The new password must contain at least one uppercase character
④ The new password must contain at least one digit
⑤ ⑥ The new password must contain at least one special character
. ⑥ Do not contain consecutive digits or words.