The profit from the production of blind impeller is 66.3702 million yuan. The annual operating income is 287.28 million yuan, the total cost is 220.9098 million yuan, taxes and surcharges are 2.4155 million yuan, the total production profit is 66.3702 million yuan, the total profit and tax is 77.9402 million yuan, and the after-tax net profit is 49.7777 million yuan. The louver wheel (louver wheel) is called a strong elastic grinding disc, which is made of plastic or fiber mesh cover and abrasive cloth sheets.