aluminum profile extrusion press machine plant line process has high capacity or capital elasticity, large-scale production and diversified products. Since the depreciation rate of production equipment is slower than the rate of excess return returning to the market average return, it is a certain result for manufacturers to return to the average return to control their operations. The difference between competitors is reflected in the interest control, while the aluminum processing front-end equipment.Aluminum processing is an industry that is difficult to establish a competitive barrier. The melting, casting, hot rolling and cold rolling equipment has a high versatility, and large-scale production can reduce the financial and management costs of unit products. In addition, the diversified product structure is conducive to adjusting the output of enterprises according to the conversion of market demand and maintaining the stability of profits.When excess returns occur in the subdivided industries, enterprises can expand their production capacity faster than their competitors through capital reinvestment, because processing equipment determines product quality to a certain extent. However, the bottleneck of equipment is often capital, so when a sub industry has excess earnings, the influx of capital will quickly erase the excess earnings.There are aluminum processing sub industries with excess earnings. Taking air conditioning foil as an example, China's air conditioning foil production has increased nearly four times since 2004. The gross profit margin has dropped from 15% to 10% at present, which is close to the average return of the aluminum processing industry. If the consumption structure of aluminum materials is compatible with the structure of economic development, the company's management needs to have a forward-looking positioning or transform to the emerging fine molecule industry.To realize the Z maximization of excess income benefits, it is not only how good the industry is "or" who has the money to compete with ", but also" who can compete faster ". At this stage, it is necessary to look at: pop can materials, automobile aluminum alloy plates, high-end electrode/capacitor foils, rail transit structural materials, etc.