how to improve gross profit margin The level of productivity of society determines the organizational form of social basic economic units. Enterprise is the result of the development of social productive forces to a certain level, which is the product of commodity production and exchange of goods. According to the travelling expenses data, in mid-december in zhejiang market price of R22 / everything/R410a 1.53/2.57/36500 yuan/ton, respectively, from early September at the bottom of the periodic rebounded 20% / 38% / 46% respectively, the downstream demand off-season, but the price of raw material hydrofluoric acid, chloride methane due to higher environmental factors superposition enterprise starts ascending space limited (according to the travelling expenses, effective device industry starts. Seventy percent), refrigerant price off-season does not light. Moreover, the average price of r22/r22/r134a/R410a has increased by 68%/32%/103%, respectively, from 2016Q4. Compared with the raw material spread, we have been able to calculate the company's overall profitability. JuHua shares announcement to United Nations integrated circuit industry investment fund (hereinafter referred to as "funds"), and other joint venture set up in the giant core technology co., LTD. (hereinafter referred to as "the giant core technology"). The company has registered capital of 1 billion yuan, with a total of 390 million yuan invested by the company and the large fund, with a 39 percent stake in each other, and a 22 percent stake in other investors. Brexit offers a chance to "reshape the structure of the UK economy", but the impact of regulatory barriers could hurt carmakers and the financial sector. If classical economists have interpreted the "market" as "laissez-faire", coase has answered the question of how to achieve "laissez-faire" or "price mechanism".