Qin Chuan, a genius with a double degree in science and engineering, accidentally traveled to Hu Hai, the second emperor of Qin Dynasty. Faced with the darkest beginning of Zhao Gao's dictatorship, the restoration of the Six Kingdoms, and the Xiongnu's oppression, he relied on modern chemistry, military, agronomy and other interdisciplinary knowledge to survive step by step in the conspiracy and war. Use fireworks to scare the powerful officials, use Yang Lie as an edge to break the situation, and recruit the talented girl Ying Ling, the oiran agent Su Wanqing, and the mechanical genius Gong Shuyao to form a "defying team". From improving gunpowder to building the Great Wall of Cement, from promoting Champa rice to establishing a modern military academy, he used scientific thinking to reshape Qin law, used performance appraisal to rectify bureaucracy, and even broke the shackles of history with the prototype of "constitutional monarchy." During court battles, battles on the battlefield, and the rapid development of science and technology, he laughed and said that "the ancients did not have enough brains", fell in love with Xiang Yu and Yang Lie, and set off a life-changing journey spanning five volumes with three beauties. When the fireworks lit up the night of Xianyang City, he vowed to tear up the prophecy of "the death of the second generation", and use the hard-core operations of a science student to create a new prosperity for the collapsed Great Qin!