Transmigrating to the Qin Dynasty to Pursue Scientific Research

I'm a double PhD in quantum physics and materials science, and on my first day in the Qin dynasty, I'm already facing execution.

In desperation, I pull out a lighter and shout, “Your Majesty! I can make the Great Qin cavalry travel eight thousand li in a single day!”

The First Emperor narrows his eyes and throws me into the alchemy chamber. “If you can't make an elixir of immortality, I'll refine you instead.”

I turn around and invent concrete and blast-furnace steel, then make the First Emperor a 28-inch bicycle for good measure.

But on the day he rides it around the realm with Meng Tian, I receive a parchment from Rome: “Eastern Devil, do you dare accept our challenge?”

Wait, why is the Latin grammar so terrible?