More than half a year has passed since the Yongwen Line bullet train rear - end accident on 7.23, and the great shock it caused to the people has gradually weakened. After the accident, the State Council established an accident investigation team and the official investigation report on the cause of the accident was finally completed after more than five months of investigation. The State Council recently approved the investigation report on the especially major railway traffic accident on the Yongwen Line in "7·23".