Group 1 - The company's stock price closed at 4.64 yuan on August 20, down 0.14 yuan, representing a decline of 2.93% [1] - The trading volume on that day was 30.22 million shares, with a total transaction value of 1.413 billion yuan [1] - The stock experienced significant price fluctuations, reaching a high of 4.89 yuan and a low of 4.52 yuan, resulting in an amplitude of 7.74% [1] Group 2 - The company specializes in the research, production, and sales of copper and copper alloy products, including plates, strips, foils, and pipes [1] - Its products are widely used in various sectors such as electronics, communication equipment, and construction decoration [1] - The company's total market capitalization is 8.381 billion yuan, with a circulating market value also at 8.381 billion yuan [1] Group 3 - On August 20, there was a net outflow of 105 million yuan from the main funds, accounting for 1.25% of the circulating market value [1] - However, over the past five trading days, there was a cumulative net inflow of 214 million yuan, representing 2.55% of the circulating market value [1]