Group 1 - The company China Railway Materials (SZ 000927) announced the resignation of Mr. Yao Chenghao from the supervisory board due to reaching the statutory retirement age [1] - For the first half of 2025, the company's revenue composition is as follows: railway comprehensive logistics and hazardous materials logistics services account for 68.87%, engineering construction materials manufacturing and integrated services account for 22.58%, and railway industry comprehensive services account for 8.56% [1] - As of the report date, the market capitalization of China Railway Materials is 17 billion yuan [1]