That's why you monitor there conversation (google translator) and wait for someone else to try before you do and confirm that he is safe lol. It's the same thing as someone cracking software on their computer, or downloading .exe files from some site then installing it on their PC, little does he knows how safe the file could be, or what harm could be done to his computer and his privacy. Still he insist and try it out anyway.

That's just human nature, we are one risky race on this planet. Everyone is a gambler at some point right

There is a risk but risk is worth taken if you don't try it out then you wouldn't know. The chinese dude is either a Nokia employee in China branch or he could be a friend of one of the China testers branch.