QQ used to imitate ICQ. ICQ is an international chat tool, which means I'm looking for you. OICQ imitates it by adding an O before ICQ, which means "Open me to find you", but it is accused of infringement, so Tencent boss changed the name of OICQ to QQ, which is the QQ we use now, except the name. Because the little penguin in the logo is cute, it is cute in English, and because it is homophonic with Q, it is also a good name for the little penguin by QQ. By 2000, Tencent's OICQ had basically occupied nearly 100% of the online instant messaging market in China, which basically sealed the victory. At this time, trouble came. AOL sent a lawyer's letter to Tencent. ICQ is a registered trademark of AOL, so any similar software that uses the word ICQ in its name risks infringing the right to use the trademark of Chuyou. Ask Tencent to change the name of OICQ, or go to court.

Therefore, in version 0325 of OICQ 2000 Build, OICQ made another self-protection change in advance, but version 0325 called itself "QQ2000" from the beginning of the installation file to avoid legal conflict with ICQ. This QQ was originally a nickname for OICQ by netizens, but it became the official new name of OICQ overnight.