First of all, you need to install qq software on your computer, download /QQ/dlqq.shtml here, run this software after installation, enter the QQ number you applied for in QQ number, enter your password, and then log in. Of course, if you want to chat with others, you must know their QQ number first, or simply find online users. The search function is located at the bottom of the QQ software interface, and the icon is like a magnifying glass. Just try other functions. For voice chat, there is no need to install a microphone. Basically, you can buy a microphone and plug it into the MIC port of the sound card behind the motherboard, but you should adjust the volume of the microphone in the volume control of the system. If not, just use it directly.