CRCC(SH:601186) Mei Ri Jing Ji Xin Wen·2025-11-14 09:23Core Viewpoint - Recent investigations revealed potential quality issues with rubber materials used in the construction of the Yinba Railway, specifically concerning the EPDM rubber sheets, which may compromise bridge safety and longevity [1][6][18]. Group 1: Quality Issues - The rubber sheets tested were found to be easily cut and torn, with a tensile strength of only 1.78 MPa, which is just 15% of the required standard of ≥12 MPa [6][8][18]. - The material analysis indicated that the rubber was primarily isoprene rubber rather than the specified EPDM, which has inferior weather resistance and durability [8][18]. - The presence of rough edges and irregular particles in the rubber sheets suggests that they may not meet the quality standards expected for EPDM products [8][18]. Group 2: Regulatory Response - The National Railway Administration has taken the issue seriously, forming an investigation team to verify the claims regarding the substandard rubber materials [1][6]. - The project manager from China Railway 16th Bureau expressed a lack of understanding regarding the material properties and relied solely on inspection reports for quality assurance [9][16]. Group 3: Financial Impact - Following the news, shares of China Railway Construction Corporation (601186.SH) experienced a slight decline, closing at 7.97 yuan, with a year-to-date drop exceeding 10%, resulting in a total market capitalization of 108.2 billion yuan [4].