云煤能源：股票交易异常波动公告

Group 1 - The core point of the article is that Yunmei Energy announced a significant stock price fluctuation, with a cumulative increase of over 20% in closing prices over three consecutive trading days [1] - The company confirmed that its production and operational activities are normal, indicating no major adjustments in market conditions or industry policies [1] - There have been no significant fluctuations in production costs or sales, and the internal operational order remains stable [1] Group 2 - The company stated that there are no major events affecting the abnormal stock price fluctuations, and no undisclosed significant information exists [1]