黄河旋风：不存在应披露而未披露的重大信息

Core Viewpoint - Huanghe Whirlwind (600172) announced that its stock price has deviated significantly, with a cumulative increase of over 20% in closing prices over three consecutive trading days, indicating abnormal stock trading activity [1] Company Operations - The company conducted a self-examination and confirmed that its production and operations are normal, with no significant changes in daily business activities [1] - There are no undisclosed significant information that could impact the company's stock price fluctuations from the company, its controlling shareholder, or actual controller [1]