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<br> <br><p>Men play games on computers in an internet bar in Beijing. 'Freedom and order' are both necessary in cyberspace, Chinese President Xi Jinping said on Dec. 16, 2015, as he opened a government-organised internet conference condemned by campaigners as an ... GREG BAKER/AFP/Getty Images</p><br><br> <br><br><br><br> <br><p>On a recent trip to China, the Great Wall took my breath away. And then the Great Firewall took my internet away.</p><br><br> <br><br><br><br> <br><p>The most extensive surveillance system and censorship tool in the world, China's Great Firewall blocks everything from popular social media sites such as Facebook, Twitter and Instagram, to search engines like Google to respected news sites like The New York Times, The Wall Street Journal and BBC.com. But just as the Mongols, Turks and Manchus once breached the Great Wall, I was able to tunnel under the Great Firewall with one simple tool - a VPN. Available free o