[Golden Shield Co., Ltd.: The company's low-altitude ducted thruster business is still in the early stage of industrialization] On October 19th, Jindun Co., Ltd. (300411.SZ) announced that the deviation from the closing price increase of the company's stock on two consecutive trading days on October 16 and October 19 exceeded 30%, which was an abnormal fluctuation in stock trading. The company has found that the market has recently paid high attention to the concept of low-altitude economy. The relevant situation is explained as follows: The company is mainly engaged in the research and development and intelligent manufacturing of high-end intelligent ventilation system equipment. Its products are widely used in key fields such as nuclear power and hydropower, national defense engineering, rail transit, and large-scale industrial and civil buildings. In terms of low-altitude economy, the company's low-altitude ducted thruster business is still in the early stage of industrialization, and there is great uncertainty in the market prospects. At this stage, the revenue from this business accounts for less than 1% of the company's overall operating revenue, and it has not yet formed large-scale revenue.