The company issued 40 million A-shares, accounting for 25.64% of the total share capital after issuance, and 156 million shares after issuance. The Zhangqiu Public Assets Management Committee and Zhangqiu Public Assets Management Co., Ltd. are the actual controllers and controlling shareholders of the company, respectively. The company's main business is R&D, manufacturing and sales of Roots blowers. In recent years, the blower business revenue has accounted for more than 65% of revenue. With the Roots blower business as the core, the company is actively expanding its product line. Currently, it integrates R&D, design, processing and manufacturing of mechanical products such as centrifugal blowers, complete pneumatic conveying systems, industrial pumps, and mills. Roots blowers are growing steadily, and market capacity is expected to expand. From 2002 to 2009, the compound annual growth rate of Roots blower production was 22.36%; the compound annual growth rate of output value was 19.10%, and the market capacity of the industry grew steadily. Looking at the long term, China is still in the middle of industrialization. Demand for Roots blower products is strong due to the steady growth of the national economy and industrial upgrading, energy saving and consumption reduction, and environmental protection brought about by the transformation to a new type of industrialization, and the size of the Roots blower market is expected to continue to expand. The downstream demand for the company's products is extensive. Roots blowers are widely used in various production processes in the chemical, cement, metallurgy, and power industries, and fixed asset investment in these industries can effectively drive their market demand. The water treatment industry has developed rapidly in recent years, and sales of Roots blowers in this industry are growing rapidly. Furthermore, the rapid growth of emerging industries such as pneumatic transportation and gas separation has also made the Roots blower industry have good prospects for development. The fund-raising project is expected to break the company's production capacity bottleneck. The company's fund-raising investment projects include: a new energy-saving Roots blower project, a centrifugal blower project, and a gas transmission production base construction project. After the implementation of the fund-raising project, it is possible to break the bottleneck in the company's production capacity and expand the company's production scale. The project has good profit prospects. After delivery, it is expected to increase the company's revenue by 574.8 million yuan and the total annual profit of the company by 125.37 million yuan. Reasonable valuation price range. We expect the company's EPS to be 0.55 yuan, 0.67 yuan, and 0.82 yuan after dilution in 2011-2013. Considering the PE value of related companies and related markets, we give the company a price-earnings ratio of 18-22 times 2011, and the corresponding price range is 9.90-12.10 yuan. Risk warning. Risk of macroeconomic fluctuations; risk of changes in downstream demand; risk of fluctuations in raw material prices.