Lin Xiaoyu, a history student, accidentally smashed a Warring States salt shaker in a museum and traveled to the Hexi battlefield during the Qin Xiaogong period. When modern science and engineering thinking hit the troubled times of the Warring States period when "salt was more expensive than gold", he relied on the evaporation crystallization method to boil refined salt, and became a "salt-making genius" who changed the logistics pattern from a prisoner of the Qin army's scouts. Carrying modern relics such as mobile phone screen fragments and lighters, he set off fire attack tactics in the Jingyang camp to repel the Wei army's cavalry, and broke through the bottleneck of boiling salt with the improved technology of "bronze tripod with pottery urn". As the salt-making technology shocked the Qin court, he was about to meet the young Qin Xiaogong and Shang Yang, who had not yet taken power. In the wave of changes in "farming war" and "technology", he proposed the advanced idea of "military knighthood + technical official position".
When he tried to use the compass to improve the tactics of the Qin army and use sulfur and saltpeter to develop early firearms, he found that every step of his invention was shifting the gears of history - the early emergence of the refined salt industry may shake the economic foundation of Shang Yang's reform, and the iron gap with Wei Wuzu forced him to start a secret technological revolution in the Bronze Age.
On the one hand, there are the doubts of the old aristocrats about "strange skills and ingenuity", and on the other hand, there are modern images that occasionally flash from time and space anchors (broken pottery shards). In the process of failing to invent glass and searching for kaolin, Lin Xiaoyu gradually realized that he was not only on a mission of survival, but also a civilized experiment that reshaped the pattern of the Warring States Period. When he met Gongsun Yang, a Patriot who preached reform, in the market, the two "reformers" from different time and space finally collided -
