Master Math, Science, and Chemistry, and You Won’t Fear Traveling Across the Western Han

When the Xiongnu cavalry bears down on the frontier, the signal he lights is not a beacon fire, but a Fibonacci sequence. Chen Jian, a seventeen-year-old high school student, transmigrates after a car accident into Lin Mo, a garrison soldier on the Western Han border. He tricks the Xiongnu into retreating with the Fibonacci sequence and uses Bernoulli’s principle to drive them off with a sandstorm. He improves papermaking, derives the theory that the Earth is round, and creates a “recursive beacon system,” yet turns down a noble title and retires, saying, “The true Great Wall is the light in a child’s eyes.” From the Hexi School of Mathematics to the 2025 IMO exam hall, the torch of science, passed down across two thousand years, is quietly rekindled as snow falls over Yanmen... Hard-science historical fiction meets humanistic reflection. Equations are compassion, and questions are light.