Why I set the target exchange rate between Yuan and Dollar as 3:1? essentially currency nowdays has less to do with gold, but more with economic activities, impact and effectiveness in global economy. during last recession if not over yet, China printed roughly 4.5 trillion yuans, "in return", Ben put 1.5 trillion dollars of extra cash on market. both enjoyed equal amount of pain relief. that is where it comes from. arguably I gave this ratio in 2006 and repeated in 2007. It was simply adopted by both parties during aftermath period. LOL!