Yun Hongqi laughed maniacally after hearing the news of Milan's death. When he learned that Milan had brought the brooch he had given him when he died, his smile disappeared instantly, and he came to Mrs. Yun's tomb to confess that the murderer was dead.Kunwu has already sent a letter to the Japanese military headquarters to determine the Japanese army's march route.And Yun Hongshen decided to stop Kunwu Ke Jingping's plan at the expense of himself.On the surface, he was still discussing with Ke Jing, Pingxu and Wei Snake at the Juntong Station about how to find the key. During the process, Yun Hongshen found the key and hid it in his home.Ke Jingping still sent Gong Shiyi to watch Yun Hongshen to get the key. Gong Shiyi and Yun Hongshen found traces of Zongfang at Yun's house and found the key. It turned out to be Jinghuayuan.While Ke Jingping sent Yun Hongshen to get the key, he handed the codebook that Yun Hongshen had found and deciphered to Xue Yue's adjutant, and asked him to decipher it himself. The content showed the direction of the Japanese army, and the adjutant brought him back to the headquarters..When the adjutant was leaving, he was stopped by Yun Hongshen and pointed out that the code book was fake. Ke Jingping's identity as Kunwu was revealed on the spot. Adjutant Xue Yue and everyone in the military did not know who was real and who was fake. They entered the secret room together under the witness of everyone present., only to find that Ke Jingping's secret room had been disguised and changed, and there was no trace of Kun Wu.Ke Jingping brought Yun Hongqi and Wen Yeming to the military command station, but Yun Hongqi asked his men to notify Secretary Wu in time.