My grandfather was also born in the New Fourth Army and worked in the Fourth Division of the New Fourth Army. I have been on the phone with my grandfather every day these days, and he told me that most of the historical materials of the war in the play are true. For example, Xie, the captain of the broadsword team, does exist, but his name is not Xie. He and Chen Yi became friends of life and death; There was also an important meeting that decided the fate of the New Fourth Army. My grandfather said that he was driving from morning till the next morning, which delayed the best breakthrough time. There is also a traitor in a certain unit of the New Fourth Army. The traitor turned out to be a telegraph operator. Every time the soldiers are transferred, the Japanese know it. My grandfather said it was true.