Any plan includes some elements. One of the first decisions to make is to use the money to do foreign exchange. How much money is actually used depends on a lot of considerations: the first is a trader's motivation, and if it's just to try or play it, it's better to have less money. The other is the enterprise of the trader, who is willing to take much risk to make money. A related factor is the age of the trader, because it involves his family, health, seniority, and his family's attitude to his speculation. These are not insignificant factors. In summary, the most basic point is that traders should not risk the loss of a potential loss commensurate with their importance. 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. In ancient China, the term "sedan" was used to refer to the sedan chair. When western cars entered China in large Numbers, it was the closed square cars that were popular in the west Today, because all of these reasons, the central bank hit: lost the inflation target, failure to maintain financial stability, not transparent to restore stability, without fully considering the global impact of policy. Politicians are unhappy with their performances and are seeking to regain control.