2010, defined as the most complicated year in the economic circle,has already wit- nessed quite complex and changeable uncertainties of the macro economy when just passing the middle of the year. Before April,the academic circle was stil very confident about the recovery of the macro economy and many data also evidenced that the China's economy was the engine for pulling the world economy out of the bottom. However, since the mid May, with some signs of economic cooling showing up, pessimis- tic sentiment rose along again, and words came around that the economy may encounter a doubly-dip and the second round of stimulation package was required.