ICQ is English "I"

seek

The abbreviation of "you" in Chinese means-I'm looking for you.

QQ used to simulate ICQ, which is an international chat tool, and it is I.

seek

You (I'm looking for you) mean that OICQ imitates it and adds an o in front of ICQ to indicate opening.

I

seek

You, which means "open ICQ", was accused of infringement, so Tencent boss renamed OICQ QQ, which is the QQ we use now. The logo of Tencent QQ has always been a little penguin except for its name.