Under the theoretical framework of the theory, the theory of commodity market equilibrium and the monetary market equilibrium of Keynesian theory are unified. Marx's theory of interest rate decisions from the perspective of the source and essence of interest, taking into account the institutional factors in the role of interest rate decisions of interest theory, its theoretical core is the interest rate is determined by the average profit margin. Marx believed that under capitalism, interest is a part of profit and a form of conversion of surplus value. The social profit generated by enterprise activities is the addition of economic profit or the external economic effect of the activity. Companies may make significant monetary profits, but external economic effects often result in negative results, and substantial social profits may be minimal. Such as the industrial revolution, the mass production of the factory is low cost and price of product, but in order to earn maximum profit, factory owners and lower production costs, lead to the low wages of child labor, as well as improper handling industrial waste or contaminants and other social burden. As the center of global automotive engine research and development and production, Britain's powertrain design has always maintained the world's leading level, especially in engine design. In 2013, the UK produced 2.55 million engines, accounting for 30 per cent of total European engine production, with 62 per cent of the engines exported to more than 100 countries. Lindsay Judge, a policy analyst at the foundation, said many employers were using loopholes in the law that allow agency workers to sign away their right to equal pay. New participants in the education blockchain ecosystem Lay the foundation