Group 1 - Hongqiang Co., Ltd. closed at 12.53 yuan on July 29, down 1.18% from the previous trading day [1] - The trading volume on that day was 1.29 billion yuan, with a turnover rate of 7.45% [1] - The company operates in the chemical products industry, focusing on the research, production, and sales of concrete additives [1] Group 2 - The company's products are widely used in construction projects, improving concrete performance, saving resources, and enhancing building quality [1] - Hongqiang Co., Ltd. stated on its interactive platform that its concrete additives have been applied in various domestic and international water conservancy projects, including the Tianshui Quxi Urban and Rural Water Supply Project in Gansu Province and the Amalia Hydropower Station in Guinea [1] - The technical advantages of the company's products include reducing water consumption, saving cement usage, and improving construction quality [1] Group 3 - On July 29, the net outflow of main funds was 13.68 million yuan, accounting for 0.78% of the circulating market value [1]