润建股份：公司股东李建国及其一致行动人弘泽元天累计质押公司股份1375万股

Group 1 - The core point of the article is that Runjian Co., Ltd. has announced a significant share pledge by its shareholder, which may impact the company's financial stability and investor confidence [1] - As of the announcement date, shareholder Li Jianguo and his concerted party have pledged a total of 13.75 million shares, representing 11.81% of their holdings and 4.84% of the company's total share capital [1] - The company's revenue composition for the first half of 2025 indicates that the pipeline maintenance business accounts for 99.93% of total revenue, highlighting a heavy reliance on this segment [1] Group 2 - The current market capitalization of Runjian Co., Ltd. is reported to be 11.3 billion yuan [1]