History witnesses landmarks and understands where the Korean War is bound to be. Only at the breakpoint did we know that the bridge was broken on a rotating, open and closed bridge deck with complex structures and machinery. At that time, Japan could not hand over the drawings and key components of the bridge repaired to China, so when it was broken, it would not be repaired again. In addition, the bridge body on the Chinese side left few bullet marks and holes, indicating that the United States bombing had indeed deliberately restrained the scope. Of course, if the bridge can be blown up, there is no doubt that the U.S. military will fly across the border.