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so the difference on numbers of users between the two companies is not that big considering only one 360 safe can be run on a PC while it's normal to run several QQ accounts at the same time on PCs or other devices like cellphones and tablets, but their implications are undoubtedly tremendous

that's because very often a person has more than one QQ for different usages(working or personal), and a lot companies use QQ as a tool, aside from tel, for their customer service, actually the largest social network in China did not rest in renren but QQ

my source tells me the qq user base is around 600M