Thanks for the comments Brenda. I don't use Renren or Kaixin, but because Facebook is blocked in China I guess there is a big gap in the market for that type of social media.

The difference with WhatsApp is that you need a telephone number to have an account. It does not work on a tablet whereas WeChat does, giving it a wider use. But thanks for clarifying exactly what the Chinese version of Facebook is.

I've not used TalkBox. Does it have similar features to WeChat? For example a newsfeed?