Group 1 - The article lists several companies under monitoring due to stock price fluctuations, indicating potential volatility in their stock performance [1] - The monitoring periods for the companies vary, with some starting as early as August 15, 2025, and ending in early September 2025 [1] - Specific companies mentioned include *ST高鸿, 思泉新材, *ST苏吴, 赛诺医疗, 东芯股份, and 淳中科技, each with designated monitoring dates [1] Group 2 - 赛诺医疗 has two separate monitoring periods listed, indicating heightened scrutiny on its stock performance [1] - The monitoring for 东芯股份 began on July 7, 2025, suggesting earlier concerns regarding its stock activity [1] - The article does not disclose the reasons for the monitoring or the specific events leading to these actions [1]

Group 1 - The article lists several companies under monitoring for stock price fluctuations, indicating potential investment opportunities or risks in the market [1] - Monitoring periods for the companies vary, with some starting as early as July 21, 2025, and ending as late as August 21, 2025 [1] - Specific companies mentioned include Dongxin Co., Beifang Changlong, Dongjie Intelligent, and Xizang Tourism, among others, with their respective monitoring dates outlined [1] Group 2 - The monitoring dates for Dongxin Co. are from August 8, 2025, to August 21, 2025, with a fluctuation start date of July 25, 2025 [1] - Beifang Changlong has a monitoring period from August 8, 2025, to August 21, 2025, with fluctuations starting on July 28, 2025 [1] - Xizang Tourism's monitoring period is from July 31, 2025, to August 13, 2025, with fluctuations starting on July 21, 2025 [1]