Ok well lets see, the coin could theoreticaly be genuine as there is no reason why one coudnt exist in china or anywere else for that matter, but the odds are stacked against it knowing what we know about the chinese counterfiters

Reason for a coin been in any part of the world is quite simple people travel, yes even then LOL just think of the number of sailors who must have visited china and the coins they would have spent after all it would have been the weight of the silver or gold that matterd.
What I can not understand is why you bid on a coin that you were unsure about? Ruben on the question of slabs they are forging them as well!!