After the Battle of the Gods, Jiang Ziya cut off the ladder to heaven with one sword, cutting off the connection between heaven and the human world. The Jade Emperor was afraid of disorder in the human world, so in exchange for "avoiding the calamity of cannibalism for thousands of years, Nian Jin", he invited the Nian Beast Royal Sister, who loved inventing and ventilating water skills, to come down to earth and record the "Three Thousand Years of History of China" starting from the Zhou Dynasty. Nian Jin came to the world carrying Fang Tian's painted halberd and carrying a fire gun. He had just invented the curved shaft plow in Haojing when he bumped into the Jade Rabbit Yue Li who had sneaked away from Guanghan Palace. This 16-year-old longevity rabbit had black hair and black eyes. He could wield a spear more skillfully than the heavenly soldiers. The medicine gourd contained a magical elixir that could cure the plague. However, because he mistakenly used the bronze tripod as a cooking pot, he was chased as a "demon rabbit" by the people of Zhou Dynasty. Nian Jin wrote from the Zhou Dynasty to 2025, using gunpowder to fight monsters in the Classic of Mountains and Seas, and relying on a water-powered printing press to spread the Treatise on Febrile and Miscellaneous Diseases. During the An-Shi Rebellion, he shot and killed the rebels with blunderbuss, but wept and wet the manuscript when recording "One hundred thousand soldiers and civilians jumped into the sea" in Yashan; Yueli gunned down the Chu army's food truck during the Chu-Han struggle for hegemony, built a field hospital during the Anti-Japanese War in the Republic of China, and secretly plays mobile games in modern times (complaints) "The Jade Rabbit in the game is too weak"), but always hides in Nian Jin's arms and cries when he can't save everyone. From the city walls of Haojing to the 2025 Shenzhen Science and Technology Park, from the Taotie rebellion in Shanhaijing to the mutant Nian beast attacking the city, the two Shu used their halberds and spears to protect China for three thousand years. There is the joy of Nian Jin criticizing Qianlong for "repairing books is like destroying books", the frustration that Yue Li cannot save the child, and the humor of the two drinking under the Big Wild Goose Pagoda and playing the spear as a guitar. In the end, Nian Jin takes the history book back to heaven, only to find that the fragments of the ladder are moving, and the Jade Emperor only said: "They should guard this world by themselves, you can stay."
