Group 1 - The stock price of Guoanda as of August 20, 2025, closed at 31.00 yuan, down 0.10 yuan or 0.32% from the previous trading day [1] - The trading volume on that day was 202,900 hands, with a transaction amount of 647 million yuan, reaching a high of 33.38 yuan and a low of 30.00 yuan, resulting in a fluctuation of 10.87% [1] - Guoanda operates in the specialized equipment manufacturing industry, focusing on the research, production, and sales of fire-fighting equipment and intelligent fire-fighting systems, primarily serving the electric power, transportation, and petrochemical sectors [1] Group 2 - On August 20, Guoanda's stock experienced rapid fluctuations, with a decline of over 2% within 5 minutes at 9:58 AM, followed by a rebound of over 2% within 5 minutes at 2:46 PM [1] - In terms of capital flow, Guoanda saw a net outflow of 23.83 million yuan on August 20, accounting for 0.63% of its circulating market value, while the cumulative net inflow over the past five trading days was 93.60 million yuan, representing 2.48% of its circulating market value [1]