Which Chinese Embassy mission? There are two - 6 and 8.
I'm guessing the first?
You will have a HELL of a time at the end of the 7th mission, but you'll know when you're there. All I'm going to tell you is to make sure you don't read any guides online (I read one after I had beaten it), 'cause a) it won't help you and b) then you'll feel cheap.