Chinese Bailout of Europe Incites Rally

It's a choppy, low-volume market today! The Dow futures were down 100 points until China announced its most recent bailout of Europe. What is their motive? Why would a sovereign wealth fund prop up a failing, insolvent country? Why would they seek to help a country that has overspent itself and is almost certain to default? This is one of those events that makes you go, "Hmmm!".