DATANG POWER (00991) announced that its A-share stock experienced cumulative closing price deviations exceeding 20% over three consecutive trading days on May 13, May 14, and May 15, 2026, constituting abnormal trading fluctuations as defined by the Shanghai Stock Exchange trading rules. The company conducted a self-review and confirmed that its current production and operational activities are normal, with no significant changes in daily operations. There have been no major adjustments in the market environment or industry policies, and no substantial fluctuations in production costs or sales. Internal production and operational order remains normal, with directors and senior management performing their duties as usual. As of the end of Q1 2026, the company's installed capacity composition was 56.80% coal-fired power, 11.05% gas-fired, 10.73% hydropower, 13.05% wind power, and 8.37% photovoltaic. Revenue from new energy power generation accounted for approximately 9.23%, representing a relatively small proportion. Currently, the company primarily relies on thermal power generation and has not yet invested in any operational power synergy projects. The board confirms there are no undisclosed matters or related plans, discussions, intentions, or agreements requiring disclosure under regulations such as the Shanghai Stock Exchange listing rules. The board is also unaware of any undisclosed information that could significantly impact the trading price of the company's stock or its derivatives. There is no need for corrections or supplements to previously disclosed information.