Description: In fact, such as QQ chat software, there are many, but basically there is no open-source, but also only provide the client software, some software such as ICQ, although the provision of services but not open-source client. I would like to know its running mechanism, I would like to find out how it is one thing, try to do so on a, although there is no formal company less complex and friendly interface, but at least can give you inspiration for learning is helpful.
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