正丹股份（300641）7月29日主力资金净流出2751.73万元

Group 1 - The core viewpoint of the news is that Zhengdan Co., Ltd. has shown significant financial growth in its latest quarterly report, with a substantial increase in both revenue and net profit [1][3] - As of July 29, 2025, Zhengdan Co., Ltd. reported a total revenue of 853 million yuan, representing a year-on-year growth of 64.67% [1] - The company's net profit attributable to shareholders reached 389 million yuan, marking a remarkable year-on-year increase of 558.59% [1] Group 2 - The company has a current ratio of 13.519 and a quick ratio of 12.557, indicating strong liquidity [1] - Zhengdan Co., Ltd. has a low debt-to-asset ratio of 5.79%, suggesting a solid financial position [1] - The company has made investments in five enterprises and participated in 55 bidding projects, showcasing its active engagement in the market [2]