Aerospace Engineering: The company's main business does not involve commercial aerospace.

Announcement of Aerospace Engineering: If the closing price of the company's stock on December 19, December 22, and December 23, 2025, consecutively increases by a total of 20%, it will be considered abnormal stock price fluctuation. The company has conducted a self-examination and confirmed that, as of the date of this announcement, there is no major information that should have been disclosed but has not been disclosed. The company's main business is based on aerospace coal gasification technology, specializing in research and development, engineering design, technical services, equipment supply, and engineering contracting of coal gasification technology and key equipment, not involving commercial aerospace. The company's latest rolling price-to-earnings ratio is 76.85, and the price-to-book ratio is 4.37, significantly higher than the industry average for the same period. The company reminds investors to pay attention to the risk of overheating market sentiment, make rational decisions, and invest cautiously.