Average salary in China has gone up quite a bit. It might be 1/3 but it's not $2.
I had a friend move his factory to China because the packaging and other costs were so much cheaper. I wish I'd asked for a breakdown. He didn't factor in/expect wages to be much of a savings.
I just pulled a random number but what I intended to say is that as long as differences in purchasing power exist and the dollar is the stronger currency, trade will move to where your dollar has more purchasing power for labor, as long as moving the finished goods back to the US isn’t prohibitively expensive.
I had a friend move his factory to China because the packaging and other costs were so much cheaper. I wish I'd asked for a breakdown. He didn't factor in/expect wages to be much of a savings.