Bitcoins don’t work for that. If you want to buy bitcoins with Currency X you need to find somone that wants to sell bitcoins for Currency X. Similarly if you want to sell bitcoins for Currency Y you need somone to buy them in Currency Y. Net result you can’t get large net cash flows unless people can exchange currency X for Currency Y.

PS: Bitcoin mining is another story, but it’s little different than building anything in China and selling abroad.