002538，被立案！

Group 1 - The core point of the article is that Sierte (002538.SZ) has received a notice from the China Securities Regulatory Commission (CSRC) regarding a formal investigation for suspected violations of information disclosure, with potential implications for the company's financial reporting [1][3] - As of the announcement date, Sierte reported that there are no other undisclosed significant matters, and its production and operational activities are normal, indicating that the investigation is not expected to have a major impact on its operations [3][4] - In the first half of 2025, Sierte achieved total operating revenue of 2.183 billion yuan, representing a year-on-year increase of 7.15%, while the net profit attributable to shareholders decreased by 43.60% to 95 million yuan [4] Group 2 - On September 1, Sierte's stock price fell by 1.98%, closing at 5.45 yuan per share, reflecting market reactions to the investigation news [5][6] - The company's market capitalization is reported at 4.652 billion yuan, with a price-to-earnings ratio of 19.56 [6]