Looks quite shady, especially given we're talking about China. Anything being wrong with the package - not even drugs - that'd be insanely bad - but I'm sure there are many other things which require special papers to get into China, or are prohibited, and if something is wrong, it's the courier's ass on the line. I don't see how it could be worth the risk of being imprisoned in China. I mean it's one thing to be in a "gray area" as an American in the US, with all legal protections and ACLU and so on, and another thing doing the same in China...

And I wonder what TSA thinks about people transporting things that they have little idea about in their luggage?