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What would you do if you were born again? Is it to rely on foresight to earn wealth that was unimaginable in the past, or to make up for the regrets left in the past? What interesting story would happen if you were not only reborn, but also acquired a futuristic black technology system? ... Chu Hao, a young and promising mathematics teacher, was surprised to find that he was back in 1998 when he woke up! Not only did he return to high school, he also obtained something called the future black technology system. In this era of thousands of sails competing, in this era that is about to take off, he is here... From a high school senior to an all-round academic master. From simple sequence geometry to Riemann's hypothesis... Chips, high-end capacitors and resistors, own operating system, photolithography machine, engine... From academic master to scientific research, Chu Hao walked step by step and finally opened his own era of black technology!