Traveling Through the Jin Dynasty

The protagonist is a young doctor. After traveling to the Jin Dynasty in a parallel space, he single-handedly prevented the tragic "Eight Kings Rebellion" and gradually guided him to develop a technological level that rivals modern times. At the same time, a large number of Chinese immigrants crossed the Bering Strait, developed most of the Americas, and expanded the living space of the Chinese nation. Moreover, later on, the technological level of the new world even surpassed that of the existing world, so that it in turn exported technology to the existing world, especially providing overall solutions to problems such as energy and cancer.