中岩大地：易山累计质押股数约为312万股

Group 1 - The core point of the article is that Zhongyan Dadi has pledged approximately 3.12 million shares, accounting for 1.77% of the company's total share capital as of the announcement date [1] - As of the report date, Zhongyan Dadi's market capitalization is 4.3 billion yuan [2] - The revenue composition for Zhongyan Dadi from January to June 2025 is as follows: geotechnical engineering 94.16%, product sales 4.87%, environmental remediation 0.53%, and others 0.44% [1]