四川双马(000935.SZ)：目前暂未参与雅鲁藏布江水电站工程项目

Group 1 - The company, Sichuan Shuangma (000935.SZ), has stated that it is currently not involved in the Yarlung Tsangpo River hydropower project [1] - The company focuses on the building materials sector, operating two cement production lines and two aggregate production lines [1] - The annual production capacity of the company is 2 million tons of cement and 5 million tons of aggregates, indicating sufficient supply capability [1] Group 2 - The building materials products are sold through a market-oriented sales model, allowing the company to quickly respond to diverse customer needs [1]