Life as a Secret Guard for a Frail Prince

Martial Arts + Semi-Fantasy + Hegemony + Time Travel + Genius I have imagined countless times, what would I do if I traveled to ancient times? I can start a business to make salt and wine, and at worst, I can become a small landowner. But after I actually traveled through time, the first thing I saw was people dying of hunger all over the place. It was a cannibal who had come to the world, and there was only four words I could do: I couldn't help myself. I draw my sword and ask my conscience. I, Xiao Zhang, draw my sword and I always have a clear conscience! Acting morally and righteously, protecting relatives and friends, pointing the sword towards the sky, that is what I want to do.