I Am a Hero

At the end of the Northern Song Dynasty, the Jin soldiers went south and the court became corrupt and incompetent. The protagonist was originally a famous swordsman in the world, but after witnessing the broken mountains and rivers and the displacement of the people, he resolutely put aside his personal grudges and devoted himself to the great cause of fighting against the Jin Dynasty. The story begins with the protagonist in a border town, one person and one sword blocking the golden soldiers and cavalry, saving hundreds of refugees, and has since embarked on a path different from ordinary people in the world.