Time and Space Trade Routes

Zhang Chengyu was struck by ball lightning, leaving a mysterious mark on his palm - a time and space portal that can travel back and forth between ancient and modern times. Traveling to Jiaoxi County, Shandong Province in the sixth year of Xuanhe's reign in the Northern Song Dynasty, he met the fleeing officials, used modern knowledge to develop industry and maritime trade, and established a base in troubled times. He did not save the Northern Song Dynasty or change Yue Fei's fate, but used trade routes to move the world: arming Mongolia, activating God's Whip in advance, and sweeping across Europe and Asia with a steel fleet. How can an ordinary college student use the power of time and space to rewrite the world map?