Yun Hong found out that Ling Han had left clues for him at the Shengxing Hotel. From Ling Han's last words, he analyzed that the key was a book - "Flowers in the Mirror" - and asked Secretary Wu to decipher the information and analyzed the Japanese army's sneak attack on Changsha.direction of march.He also confessed his suspicion to Secretary Wu that Ke Jingping was Kunwu, but Yun Hongshen suspected that the Japanese army's advance intelligence was false based on the previous performance of Milan and others.Yun Hongshen discovered that the intelligence was a strategic deception, and together with Secretary Wu analyzed that Ke Jingping had a secret radio station against Japan in the military Hunan intelligence station. Yun Hongshen decided to find out.Ke Jingping met with Milan and said that Yun Hongshen had begun to doubt him and wanted to sacrifice Milan to prove that he was not Kunwu. Milan was determined to be loyal to the emperor and launched the Jade Broken Plan; Yun Hongshen found the password box left by Ling Han and deciphered it.Password, he got Zongfang's identity statement and the drawings of Ke Jingping's secret room from the password box. Only then did Yun Hongshen know that there was a secret room in Ke Jingping's office. Yun Hongshen decided to find out and find out Ke Jingping's true identity.