Visual inspection is easy to find, if it is a gas pipe that breaks down to see if there is gasoline in the ground. What about Mobile Internet Banking? Is Mobile Internet Banking also safe? Actually mobile internet banking is using the identical security because normal internet banking. The only different is that mobile internet banking users are logging inside their account using their mobile devices as opposed to normal PC. Unfortunately, this is how the chance could originate from. If classical economists have interpreted the "market" as "laissez-faire", coase has answered the question of how to achieve "laissez-faire" or "price mechanism". 3. The cost of accounting earnings is listed in historical cost. Due to the current accounting practice in the enterprise asset is measured at the historical cost in, with the cost nature is the historical cost has been derived from the law of the transfer, so as to determine the income is an important factor in the cost and the historical cost. 6. The accounting benefit is bound by the prudent principle. According to the principle of prudence, when there are a variety of accounting methods to choose from an economic business of an enterprise, it should choose a method that neither overestimates nor depreciates the benefits. Enterprises manipulate profits to achieve homogenization of profits, most of which adopt the method of overestimating earnings, and the subjective selection of the period of value-added.