Then the interest rate theory of the loan is the interest rate theory of neoclassical school, which is proposed to correct Keynes's theory of "liquidity preference". In some ways, the theory of interest rate can be regarded as a synthesis of classical interest rate theory and Keynesian theory. So, again, stay objective and open, don't close yourself, always be curious and curious, so that you can get motivated to keep moving forward. Strictly speaking, closing yourself out, denying someone else is the equivalent of your trading life going into the end. The key is to see what you want. Identifying your pursuit determines the direction and motivation of your study. The market is changing, the pursuit is improving, so you never stop learning. Through continuous thinking and learning again, I found any trading tools on the market and reasonable analysis method has its existence value, but there is a reasonable value, not the existence of absolute value. The market will always operate under these limited factors, but different stages affect the dominant factors of the market. If you close yourself and stick to some idea, then when the market's dominant factor is not your acceptance and understanding, you will be in a state of confusion and loss. Not learning or accepting other valuable things is equivalent to losing a lot of market opportunities and understanding the market. The market is very big, the connotation won't have big change, but the disposition and the expression way but often change. If you don't keep learning and absorbing, you will eventually be eliminated by the market, regardless of who you are. Historical costs differ from current values Cylinder work volume refers to the volume of gas swept by the piston from the top to the bottom, also known as single cylinder displacement, depending on the cylinder diameter and the piston stroke. Engine displacement is the total volume of working volume of each cylinder, usually expressed in milliliter (CC). Engine displacement is one of the most important structural parameters. It is more representative of engine size than cylinder diameter and cylinder number, and many indicators of engine are closely related to displacement. 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.