Modern intelligence expert Lu Chen accidentally traveled through Xuchang four years after Jian'an and became a secret agent of Cao Cao's codename "Shadow Scale". When the bloody storm of the Yidaizhao swept across the capital, he relied on his original "Intelligence Triangle Verification Method" to forge key evidence and used micro-expression psychology to control secret message delivery nodes. From the Eight Formation Diagram Code to the Hidden Stake Training System, he planted the seeds of splitting Cao Ying on the eve of Guandu, which ultimately led to the conclusion of the first "Huaishui Intelligence Convention" in history by the three kingdoms of Wei, Shu and Wu. Let's see how intelligence deconstructors use modern thinking to reconstruct the rules of troubled times - in this war without gunpowder smoke, the light of the sword is hidden in the ink marks on the bamboo slips.