The market is the economic contact method which is the basic content of Commodity Exchange. Under the condition of commodity economy, the premise of exchange generation and existence is social division of labor and commodity production. Because of the social division of labor, the different producers, respectively, engaged in the production of different products, did not meet the needs of themselves and others and exchange their respective product, so that the general labor products into commodities, make the product production is transformed into commodity production. It is under this condition that the market for goods to be exchanged to meet the needs of different producers is born. Therefore, the market is the product of the division of labor and the exchange of goods under the conditions of commodity economy. The market and commodity economy have inalienable internal relation The stability and mobility of style is an important category of research style problem. The stability of style, or relative stability, refers to the main style characteristics of a writer once formed, which often runs through many stages and many aspects of the writer's creation. The stability of style is mostly related to the writer's character, disposition, temperament and so on. In addition, national style and ethnic tradition, especially national character, ethnic form, and national language, are often restricted by these factors, and are also important aspects of forming style stability. The change of style mainly refers to the development of style. The maturing of the writer's style, tend to have a development process, even if has formed its own unique style, it is not rigid, but reflect the difference of the object, when writing a specific objective environment and the subjective state of mind, also will be change, show stage. The Barnsley based REHAU fabricator has seen a surge in enquiries from installers and consumers in response to its ongoing advertising, PR and web campaign and these are being passed to its stockists and distributors nationwide.