My grandfather also came from the New Fourth Army and was in the Fourth Division of the New Fourth Army at that time. These days I talk to my grandpa on the phone every day, and he tells me that most of the war history in the drama is true. For example, the captain of the big sword, Xie Chenglong, really existed, but his name wasn't Xie Chenglong, and he and Chen Yi became life and death friends; and an important meeting that decided the fate of the New Fourth Army, my grandpa said that the meeting lasted from the morning until the early morning of the next day, which resulted in a delay of the best time for the breakout. There was also a traitor within a unit of the New Fourth Army, who turned out to be a telegraph operator, and every time the troops moved the Japanese knew about it, which my grandfather said was true.