this is not because China isn't trying to market itself outside, it is because if China expands overseas, then it will threaten the interests of amazon, ebay, facebook, twitter, yahoo, gmail,cnn, and fox. if people had a chance to try out the Chinese version, 50% of them would choose the Chinese version instead. facebook, twitter, amazon, ebay, cnn, fox, gmail, and yahoo would absolutely retaliate by launching some kind of trade war, including all kinds of dirty tricks, sabatoge, etc. this is what China is afraid of, and this is why China is afraid to expand. why do you think most of the world uses gmail, yahoo, facebook, ebay, and twitter. it's not that they are unable to develop their own, it's that they don't want to break the unwritten rule, that is, do not threaten the business interests of american corporations. this is why the u.s. spends so much on military. if they had no military to back up their corporations, then people would simply go in their own direction, and the market would be up for grabs, but for now, it will stay firmly in the grips of the u.s. corps