The protagonist Jia Lei uses the [Zhutian Fishing System] to get started hard in a courtyard house with scarce supplies and complex human nature. He acquires resources, knowledge and technology through fishing, combines his own wisdom and systematic scientific research and deduction capabilities, starting from solving personal food and clothing diseases, and gradually researching Produce scientific and technological achievements and medical technologies that transcend the times. While making outstanding contributions to the country's scientific and technological development and people's health, he also changes his own destiny, exposes and punishes the beasts in the quadrangle, and finally leaves the quadrangle to become a technological giant and an unparalleled national scholar who affects the destiny of the country.
