How to tell whether the other person is male or female from the screen name?

How to tell whether the other person is male or female from the screen name? Actually, this is a little regular. Boys tend to choose more atmospheric names, such as the following one.

Or related to his industry. For example, the first screen name above: Guilin Weichuang Computer.

Most of the screen names that girls like to take are gentle or poetic. For example, as follows:

Or pretend to be cute. For example, as shown in the following figure.

These all agree that it is a boy or a girl. Another avatar can also be seen. Unless you pretend.