A recent report by the Department of Emergency Management of Guangdong Province has unveiled the causes behind the tragic collapse on the Shenzhen-Jiangmen railway line, which occurred on December 4 last year. The incident, which claimed 13 lives and caused direct financial losses of approximately 72.61 million yuan ($10.22 million), was attributed to severe regulatory violations by the construction contractor. The investigation revealed that the contractor failed to halt excavation or enhance support when tunneling through geologically unstable sections, leading to repeated collapses and ground subsidence. This negligence resulted in workers falling along with the collapsing ground, ultimately causing fatalities. The report also highlighted systemic failures across multiple entities, including construction, project management, design, and supervision units, all of which demonstrated lapses in risk management, emergency response, and on-site management. Additionally, safety supervision and industry regulatory bodies were found to have inadequately exercised their oversight duties. As a result, the responsible units will face administrative penalties and internal accountability measures, with evidence of suspected dereliction of duty by relevant personnel being transferred to disciplinary inspection and supervisory authorities.