Travel Book

Lu Yuan, a geology graduate student, found a broken bronze key and a hand-drawn map among the relics of his father after he jumped off a cliff - seven locations on the map were connected with dotted lines to form an ancient road across China. My father wrote two words on the last page of his notebook: Pingyao. In an abandoned escort agency deep in the ancient city of Pingyao, Lu Yuan found the lower half of the Tongque Key. The moment the keys came together, he saw a road that shouldn't exist - the road his father walked in 1981. That's not an illusion. It was a probability deduction system built by the ancient escort agency using gears and copper shafts - the "Road Book". It was using the bronze bird key to convey to him a message that had been encrypted for twenty-one years. At the same time, provincial newspaper reporter Shen Banxia received a letter from seventeen years ago. The sender is her adoptive mother Shen Lanzhi, and the receiving address is a place called "Shizhang Village" deep in the Taihang Mountains. There was only one sentence in the letter: You still have a brother. The two lines intersect at the Taihang Mountain Ancient Post Road. They discovered that seven travel keys were scattered in seven locations, each of which was the computing core of an ancient logistics hub. Someone has been waiting for two generations for a living keyholder to activate the system - not for treasure, but for a disaster that has not yet happened. The probability calculated by the road book is 91.3%. There are still ten months until that day.