How about the sales of environmental protection fans?

Environmental protection fans sell well. According to the data reported by the member enterprises of China General Machinery Association Fan Branch, the average annual growth rate of the output value of the fan industry is about 30% from 2017 to 2020, and the average annual compound growth rates of the output value of centrifugal fans and roots blowers are 39.05%, 18.00% and 410.20% and 18 respectively. In 2020, the domestic output of wind turbines will reach more than 90,000 units, with an output value exceeding 5 billion yuan. The growth rate of output value and output of centrifugal blower is greater than that of Roots blower.