It tells the hard-core legend about Li Erxiao's rebirth in 1980 and his use of technology to break through and rewrite the national destiny. A speculator in his previous life died of liver cancer in prison. After his rebirth, he vowed to save his mother who had terminal lung cancer, but was accidentally involved in a technological game that spanned time and space. From a young man reselling food stamps to a military industrial giant that dominates domestic chips, quantum communications, and Starlink satellites, Li Erxiao led his team to swim against the tide of reform and opening up. The story uses "timeline tampering" as the core suspense: enemy agents use quantum technology to look back on history and try to destroy China in the 1980s with future viruses. Li Erxiao relied on his rebirth memories to form a "wall-breaking team" with Chen Weiguo (a military leader), Zhou Xiaomei (rural teacher), and Zhao Tiezhu (a retired soldier), and started a life-and-death competition in the Shenzhen Special Economic Zone, third-tier factories, and Jiuquan base. From the etched codes on the five-cent coins to the cracks in the cesium atomic clock on the top floor of the weather station, they used black technologies such as photolithography machines, quantum keys, and biochips to build a "Great Wall of Science and Technology" to protect the country's destiny amid the Soviet Union's technological blockade and Western capital strangulation.