<正>The world economic growth in 2016,counted on the Purchasing Power Parity(PPP),was 3.1%,a drop somewhat from that of 2015,global growth rate continuing to slow down,global debts continuing to increase,international financial market becoming more fragile and international trade and investment becoming more bleak.As gap of household income and wealth widens and anti-globalization tendency is on the increase,the world economy is in face of quite a