There is more than one Great Wall of China. There’s the one everyone knows about, the one that astronauts can see from outer space and was built to keep out the Mongols.
Then there’s another Great Wall. This one is not quite as grand, but it has the advantage of being mobile.
Basically, as this man discovered, it pops into existence where ever it’s most inconvenient, requiring you to walk far out of your way to get where you are going.
What a great wall!
