Hu Lian, KMT, was the deputy commander of the 12th Corps during the Huaihai Campaign; Guo Rugui, a CP on the hidden front, was the director of the Operations Department of the Ministry of National Defense of the Nationalist Government at the time.
The two had a good personal relationship, but Hu, like everyone else, had no idea Guo was a CP spy.
I tried my best to write it according to real history, Guo Rugui's perspective, Qingshui, there are a little less emotional scenes, and it is inevitable to encounter ZZ.