Late Song Dynasty: I Was a Bandit in Liangshan

I, a man from science and engineering, have traveled through time. Went under the bed in Wang Po's teahouse. He was still holding something torn from Pan Jinlian's body. Don't ask, just ask. Wu Song was already banging on the door outside. I had one thought in my mind at the time: It's over. It's okay to witness history, but don't let me become a part of history! Wait I study chemistry. Lime powder proportioning, saltpeter purification, soap making... Why the hell am I thinking about this now? Survive first! Then I survived. Later, I prepared gunpowder for Liangshan, built cannons for the anti-Jin army, and taught the old foxes in the court a lesson about dimensionality reduction strikes. Later, I took the top spot in Liangshan. The brother below asked me: Brother, who should we fight next? I pointed to the north: Don't those Jin people want our country? Let them taste what it's like "Boom!" Greetings from the 21st century. Oh yes, one more thing. . . . . . . . . Let's survive first.