有研粉材：连续3日股价涨幅偏离值累计达30%，无应披露未披露事项

Core Viewpoint - The company, Youyan Powder Materials, announced that its stock experienced an abnormal fluctuation, with a cumulative price increase of 30% over three consecutive trading days from December 23 to 25, 2025 [1] Group 1: Stock Performance - The stock price deviation was identified as significant, indicating unusual market activity [1] - The company confirmed that there were no major events affecting the stock price and that its daily operations remain normal as of the announcement date [1] Group 2: Insider Trading - There were no stock transactions by the company's directors, senior management, or controlling shareholders during the recent trading days [1] Group 3: Business Fundamentals - The company reassured that its main business and fundamentals have not changed, urging investors to be cautious about trading risks [1]