Hmm...per Wikipedia the original Facebook chat was started in 2008. Facebook Messenger for mobile was 2011. QQ didn't have their mobile version till 2013.
Facebook cannibalized social networks in the US and homegrown networks abroad. Though we'd never know, I'd believe they would have done the same in China.
Facebook cannibalized social networks in the US and homegrown networks abroad. Though we'd never know, I'd believe they would have done the same in China.