Old Testament Under the City

Underneath every city, there is a contract that cannot be violated! When urban planner Lu Beihe was presiding over the demolition of an old house in the late Qing Dynasty, he discovered thirteen "codes for living people" on the back of a bronze mirror - the words swam slowly under the patina, like living creatures. That night, he witnessed the "Old City" with his own eyes: Under every hundred-year-old city there is another city hidden, which is a mirror world formed by the memories and resentments of all the dead. He is forced to become a "code fixer". Whenever urban renewal destroys a key structure—an ancient well, an ancestral hall, an old locust tree—the rules of the old city collapse, and the boundaries between reality and the old city begin to dissolve. He must enter the old city, find the "anchor" and re-contract, otherwise the two worlds will be completely merged. This is not a story about killing monsters and leveling up. This is a story about an urban planner using engineering thinking to interpret supernatural rules. Each city is its own puzzle, and each rule has its unspeakable price. The final question that Lu Beihe has to face is - when all the rules of the old city point to the same source, what did the person who originally concluded the contract do in exchange for a hundred years of peace in the world?