Winter 1943, interrogation room No. 76, Jianghai City. Chen Yundu, Major Deputy Director of the Intelligence Department, handed a copy of the "Underground Party Liaison Map" to Japanese Lieutenant Colonel Asano Shuichi. Asano was satisfied: "Chen Sang, you are more trustworthy than anyone else." No one knew that every address on that picture had been cleared three days ago. No one knew that there were two sets of identification certificates hidden under the floor of Chen Yundu's workstation - one set belonged to Puppet Major Wang, who had just been shot by No. 76 Last night. Mei's agency issued a death order: the internal undercover must be uncovered within seven days. Number one on the suspect list: Chen Yundu. He also received an order from his superiors: to escort a witness who mastered the "Sakura Project" across the blockade. The witnesses are in the hands of the gendarmerie, and the escort route must pass through the defense zone of No. 76. Chen Yundu launched the modern military training system. The system cannot shoot for him, but it can use three-dimensional projection to deduce every step of his actions in an abandoned warehouse late at night: secret sentry positions, patrol changing of guards, and interrogation psychological games. He trained a team of six ghosts, each of whom could silently bring down sentries with their bare hands. The secret token is an inconspicuous copper buckle. Those who hold the token can leapfrog and mobilize any node of the undercover network. The token can only be used once. When the copper buckle was pressed into the palm, Chen Yundu received the last secret order: "The escort of the Sakura Project is codenamed 'Raven'. The secret code - 'Do you remember the rain on the Bund in 1937?' He walked towards the military police cell. Behind him, the searchlight No. 76 Swept across the corridor, and in the beam of light, the shadow of Shuichi Asano fell under his feet. The "Raven" in the cell raised his face - it was the operator who taught Chen Yun how to read Morse code eight years ago.
