After a modern-day eighth-level master from Sakura Country successfully completed a hundred-person sparring challenge, an explosion killed him along with his opponents. His soul transmigrated back to the Republic of China era, where he awakened a space-type ability that let him open portals. Right after transmigrating, he pulled off a train robbery that shocked the world. Later, he traveled all the way to Sakura Country, kidnapped its emperor, and forced its government to cede territory, pay reparations, and apologize. If you dare research biological weapons, I'll open the door of your biological weapons lab directly into your country's capital. From then on, the world gained countless fast, straight-through portals.
