DATANG POWER (00991) announced that on May 27, 28, and 29, 2026, the cumulative deviation of the closing price increase for its A-share stock over three consecutive trading days exceeded 20%, constituting abnormal trading volatility according to the Shanghai Stock Exchange trading rules.

Following internal verification and consultation with its controlling shareholder and actual controller, the company confirmed its production and operations are normal, with no material matters that should have been disclosed but have not been.

The stock turnover rates on May 27, 28, and 29, 2026, were 7.74%, 8.66%, and 9.02% respectively, which are relatively high compared to the company's historical levels, indicating significant trading risks. As of May 29, 2026, the company's latest price-to-book ratio stands at 4.34 times, while the latest industry average for the electric power and heat production and supply sector is 2.02 times, indicating it is above the industry average.

Between May 6 and May 19, 2026, the company's stock price accumulated a gain of 101.44%. During this period, it issued one severe abnormal volatility announcement, three abnormal volatility announcements, and two trading risk alerts.

Investors are advised to be mindful of secondary market trading risks, make rational decisions, and invest prudently.