There are three types of the so called 'ghostly soldiers passing through';
The first type of ghostly soldiers passing through are formed by the resentment soldiers of ancient times or recent times lost and died in battle coupled with the right timing and geographical factors. The second type is when many people had died from a major disaster, these ghostly soldiers are actually the ghostly soldiers and generals from hell catching the souls of the victims. The third type is a war among the ghost realm.
"F*ck, there should not be that many Japanese. There were quite a number of our people who died over here during the Battle of Shanghai[1]. It should be our troops or commoners who were harmed by the Japanese who should appear."
Su Bai wasn't terrified since he had experienced much. He could remain calm when encountering ghost or any supernatural occurrence and would even have the mood to tease.