After Killing the Tyrant, I Became a Blade of Grass

Lu Li, chief minister of the Wu Dynasty, went to great lengths to bring down the ungrateful old emperor and crush the ambitions of the three neighboring kingdoms, securing the borders. He was just one step away from reforming the law and rooting out the parasites in the court when he was suddenly told that she had transmigrated and become someone else... No, not a person at all, but a blade of grass?! (No romance, just 300 years devoted to cultivation. No preservatives added. A professional cultivation team you can trust.)