Wang Mang's Mystery Game

Is Wang Mang a time traveler? Vernier calipers, king field system, five equals and six tubes - he was too advanced to be like a person of that era. But he said: "I am not a time traveler, I am a person who has been time traveled." Two thousand years later, archaeologist Chen Wei dug up a jade piece etched with a circuit diagram, a bronze key, and a diary written by Wang Mang. Four forces from the future all want him dead; but he, in two thousand years, has set up a trap that no one can solve. When you open this book, you are already in the game.