profit contribution analysis Economic profits in perfect competition and monopolistic competition market has a special purpose, a positive profit can attract more enterprises to enter the market, increasing competition and push the market equilibrium price low, exclude some enterprises lack of competitiveness in the market, to achieve long-term equilibrium; On the contrary, negative economic profit can eliminate some of the original enterprises in the market, because the supply is reduced, the market equilibrium price will be pushed up, and the long-term equilibrium will be achieved. The result of the two cases is that economic profits disappear from each manufacturer and the manufacturer's total income is at the lowest point of average cost. As we strive to earn an incredible living and pay our charges, there are also crooks who generate a full time income by robbing from unsuspecting victims. Thus, we need to always be on guard from such individuals by securing our private data and making sure that they're not taken from us and useful for crooks' advantages. The bank maintained its main interest rate by 0.0 percentage point and raised its 2017 GDP growth forecast by 2 percentage points to 2.4 percentage points.