The general value form, while the general value form is not equal to the local value form. The practice of value must be determined in a certain category. 2. Accounting earnings are based on the assumption of accounting instalments, which refers to the production and operation results of a certain period of time. Early accounting earnings is calculated according to the cash basis, and the modern accounting earnings is according to the classification current income and expenses of accrual basis, after the appropriate ratio calculated. However, the benefits of cash determination are more acceptable to users. The selection and evaluation of transactions. Engaging in foreign exchange investment, one must choose a profitable trading method. Here are some factors to consider in trading options. This may have a negative effect on the sales of Xpoint products. The accounting income follows the historical cost principle and the matching principle, which is conducive to the objective reflection of the business management responsibility of the enterprise management authorities. But, due to the historical cost principle inherent defects, especially according to the present value of revenue and expenses by historical cost line, makes the calculation of accounting earnings lack of inner logical unity, and the matching principle is difficult to carry out, so that the book value of assets can not reflect its real value, cost cannot be fully compensated. And the economic benefit is measured in the current value, which reflects the actual value of the asset, which is beneficial to the full compensation of the cost. First of all, it costs transaction cost for the manufacturer to purchase intermediate products in the market. It includes the cost of seeking suitable suppliers, signing contracts and supervising contract execution. If the manufacturer can produce some intermediate products within the enterprise itself, it can eliminate or reduce some transaction costs, and can better guarantee the quality of the products. Second, if the manufacturers need is a special type of specialized equipment, the supplier does not generally willing to specialize in only a buyer of the product of the investment and production, because this kind of proprietary investment risk is bigger. Therefore, vendors that need this specialized device need to solve the problem of specialized devices within the enterprise. In the end, the manufacturers hire employees with specialized skills, such as specialized product design, cost management, and quality control, and establish long-term contractual relationships with them. This can be more beneficial than buying the corresponding services from other vendors, thereby eliminating or reducing the corresponding transaction costs. t is more difficult to improve ability than to master knowledge. Profitability is dependent on ability, not knowledge, so you should understand why I say the ability to learn is the equivalent of trading profit. Ability can be divided into: the ability of market analysis, understanding of market performance ability, ability to sense the state of the market, the impact factors of market leading identification ability, reading ability in the subject matter of the charts, operation planning skills, and ability to execute. Any knowledge can be translated into its own ability only through its own concrete practice. At this stage, it is important to remain open and objective, and that is the principle that you can continue to learn and progress. The futures market moves forward through breaking rules rather than building market rules. This is an important feature of futures markets that are different from other markets. The futures market can only develop by maintaining uncertainty, rather than forming operation rules. Futures market is one of the most interesting feature is: the same information or trading tools on people who have different produce strange reaction, the same information or tools do not have uniqueness and correctness or authority, so, for trading, understanding of information and trading tool use is more important than the master information and tools themselves. Having a large amount of information and buying a large number of trading models will not help your analysis and trading profitability. The key is to see your understanding and application skills.