Why we need forex

Actually, while we consider the global business factors we come to one facts of it is foreign currency.It plays vital roles in global business. It depends upon more similar factors of nations in the world.We are known about chinese economic growths in this year 2009, where as all the nations are facing global economic crisis. You may think about the facts what is the main cause of not so much affecting chinese economy as if all the nations are facing the so much poor conditions in economic crisis.