What does it mean that the online registration of Three Kingdoms Kill is the parameter format is incorrect?

The format of online registration parameters of Three Kingdoms Kill is incorrect, which mainly affects that the game registration cannot be completed;

The main reasons for the incorrect online registration of Three Kingdoms Killing are:

The user name has already been registered;

User name specification is not standard;

Online registration of Three Kingdoms Kill is an incorrect parameter format. The solution is as follows:

Try not to use special characters, and try to use the letter+number pattern for naming;

When the name is already in use, you can add a number after the existing name.