Wang Mang (45–23 BCE), courtesy name Jujun, was a powerful court official and maternal relative of the imperial family in the late Western Han Dynasty, and the founder of the Xin Dynasty. Born into the prominent Wang clan, he was the nephew of Wang Zhengjun. In his early years, he was strict with himself and widely admired. He rose through the ranks to become Grand Marshal, gradually taking control of the Western Han government, enthroning a young emperor and wielding immense power. In 8 CE, Wang Mang deposed the Han and proclaimed himself emperor, founding the Xin Dynasty. He then launched sweeping reforms, known as Wang Mang’s reforms. Their intentions were noble, but radical measures and constant reversals severely damaged the economy and society, intensifying conflicts at home and abroad. In the dynasty’s final years, the country descended into chaos. Rebel forces stormed Chang’an, Wang Mang was killed, and the Xin Dynasty fell. His life remains highly controversial. He is often seen as a usurping minister who toppled the Han and a reformer whose ideals failed. This book retells that period of history from the perspective of a time traveler. It blends historical power struggles, transmigration mysteries, a satisfying comeback, and a tragic epic. History provides the framework, unofficial accounts the spirit, and legendary tales offer lessons for future generations. Readers can gain historical knowledge while experiencing the power of literature.