Mars language, is it a plaything for "mm" or an outdated relic of an era?

During a period of time, I met a few girls, and then I looked at their QQ spaces. It's better not to look, but when I did, I got a shock. This character, this character, why don't I know it? I was stunned for several minutes and even began to doubt my own learning abilities. Later, I read the articles by these girls through a combination of guessing and reasoning, which made me feel dizzy. Later, I learned that this writing is called "Mars language".