Introduction to the outdoor exhibition area: The outdoor exhibition area displays a miniature replica of the original site of the bombed "Sandong Bridge" culvert in Huanggutun, a bombed train carriage restored to a 1:1 scale, and sleepers placed diagonally And the carriage blackened by fireworks vaguely shows the tragic scene at that time. It is understood that the carriages displayed in the museum were restored based on on-site filming after the carriage in which Zhang Zuolin's sixth concubine was riding was bombed, and the extent of the bombing in the carriage in which Zhang Zuolin himself was riding was even more tragic.