[Introduction] Chen Zhang, the sharp blade of the country code-named "Dragon King", opened his eyes after his death and became "Chen Sanzi", a retired soldier who was plagued by injuries and bullied by everyone in a northeastern mountain village in 1977. Looking at the four walls of his family and listening to the ridicule of the villagers, he silently clenched his fists that were no longer strong. In his previous life, he led an elite team through life and death; in this life, he only has a few brothers who are starving and emaciated, and are also regarded as a burden. There is no system, no foresight, only tactical thinking engraved in the bones and insights beyond the times. From using his field skills to feed his brothers, to using engineering knowledge to transform the scrapped tractors in the team; from seeking justice for the brothers who were bullied, to fighting for the rights and interests of the educated youth who were made things difficult... His seemingly casual layout has quietly changed the stagnant mountain village. When the gates of the times slowly opened, and everyone wanted to fight their way into the South alone, Chen Zhang said to the brothers behind him: "Our battlefield is here. I will lead you to build this place into the 'South' that others want to come to." From then on, a unique group composed of veterans, educated youth, and craftsmen began to write a legend about loyalty, wisdom and passion in this black land.