Group 1 - Company closed at 30.54 yuan on August 21, down 0.46 yuan from the previous trading day [1] - Opening price was 30.80 yuan, with a high of 32.44 yuan and a low of 30.14 yuan, resulting in an intraday volatility of 7.42% [1] - Trading volume reached 158,000 hands, with a total transaction amount of 488 million yuan [1] Group 2 - Main business includes research, production, and sales of firefighting equipment, covering products such as firefighting robots and smart firefighting gear [1] - The company operates in the specialized equipment manufacturing industry and is registered in Xiamen, Fujian Province [1] Group 3 - On August 21, the company experienced a rapid decline in the morning session, with a drop of over 2% within 5 minutes at 9:38 AM, and a transaction amount of 114 million yuan at that time [1] - Net outflow of main funds was 59.73 million yuan, accounting for 1.61% of the circulating market value [1] - Over the past five trading days, the cumulative net inflow of main funds was 29.67 million yuan [1]