At the beginning of WeChat, you can register a micro-signal in QQ mailbox, and add W before QQ number to automatically generate a number. \x0d\ Now you can't apply for micro-signals with QQ, you can only register with your mobile phone. \x0d\ But you can log in directly with QQ, and you don't need to apply again. \x0d\QQ password is WeChat password, and QQ number is micro signal. \x0d\ If you don't want to log in to WeChat with this QQ number, you can apply for a new QQ number.