雪迪龙跌2.05%，成交额1.17亿元，主力资金净流出1345.36万元

Group 1 - The core viewpoint of the news is that Xuedilong's stock has experienced fluctuations, with a year-to-date increase of 32.11% but a recent decline of 5.47% over the last five trading days [1] - As of August 28, Xuedilong's stock price was 8.13 yuan per share, with a total market capitalization of 5.169 billion yuan [1] - The company has seen a net outflow of main funds amounting to 13.45 million yuan, with significant selling pressure observed [1] Group 2 - Xuedilong operates in the environmental monitoring and industrial process analysis sectors, with 78.96% of its main business revenue coming from ecological environment monitoring systems [1][2] - For the first half of 2025, Xuedilong reported a revenue of 596 million yuan, representing a year-on-year growth of 3.70%, and a net profit of 61.97 million yuan, up 25.51% [2] - The company has a total of 35,500 shareholders as of June 30, with a decrease of 7.53% from the previous period [2] Group 3 - Since its A-share listing, Xuedilong has distributed a total of 1.316 billion yuan in dividends, with 589 million yuan distributed over the last three years [3]