CRCC(SH:601186) Guan Cha Zhe Wang·2025-11-14 11:12Core Viewpoint - The investigation into the quality of rubber materials used in the Yinba Railway bridge has been initiated due to concerns about substandard materials being used, which could pose safety risks [1][3]. Group 1: Investigation and Findings - The National Railway Administration has formed an investigation team to verify the quality issues related to rubber materials used in the Yinba Railway bridge [1]. - A report from the Economic Reference Daily revealed that the rubber material used by China Railway Construction Corporation's China Railway 16th Bureau has significant quality issues, with tensile strength measured at only 1.78 MPa, which is 15% of the required standard of ≥12 MPa [3]. - The rubber material in question is primarily composed of inferior isoprene rubber instead of the specified ethylene propylene diene monomer (EPDM) rubber, raising concerns about potential fraud [3][6]. Group 2: Material Specifications and Implications - The EPDM rubber boards are critical for preventing direct contact between rigid structures, ensuring even stress distribution, and extending the lifespan of the bridge [6]. - An expert indicated that the substandard quality of the EPDM rubber boards could lead to a reduced lifespan of the bridge structure, posing safety hazards over time [9]. - The project manager from China Railway 16th Bureau stated that they will address any issues with the materials if they arise in the future, including potential recalls and claims against the supplier [9]. Group 3: Market Impact - On November 14, shares of China Railway Construction Corporation experienced a slight decline, closing at 7.97 yuan, reflecting a more than 10% drop year-to-date [10].