Chang'an City Defense Map

In the third year of Tianbao, Chang'an was imprisoned. Retired special soldier Lin Yan woke up and found a bloody fragment of a city defense map hidden in the interlayer of his prison uniform - ironclad evidence of collaboration with the enemy. Ordered to lurk in the Western Market, he transformed into an apprentice of Hu Shang. He speaks Persian, Sogdian, and Da Shi language at the drop of a hat; he is proficient in city defense surveying and mapping, modern investigation, and psychological games. The Hu Chamber of Commerce, the Tubo backstabbers, and the bad guys of the Tang Dynasty... The three forces are intertwined and strangled in the undercurrent of the West City. Lin Yan worked step by step to piece together a complete picture of the city's defense map. However, when the fragments were put together, he was shocked to realize that his identity in time travel was far more than just a "scapegoat".