There is an American quote: "Why buy the cow, when you could get milk for free?"
That indeed is a great question.
Why would you go to China and climb the Great Wall, when you could just get a t-shirt at an Urban Outfitters store in middle of Arizona?!
It is nice to know that the t-shirts are made in U.S.A. Fighting American jobs from oversea outsourcing one t-shirt at a time!
中國 = China
我 = I; me; myself
登 = rise, mount, board, climb
上 = top; superior, highest; go up, send up
長城 = the Great Wall