One Person and One Sword Can Cut Down the World

My name is Xu Luo, and I am a beggar. I have too many enemies in my life and I owe too many favors. So I like swords because they have double edges. I picked up this green steel sword from the garbage dump. I will use its left blade to avenge you, and I will use its right blade to repay kindness. In order to take revenge, I once cut down a street with the left edge of my sword; in order to repay favor, I once cut down a city with the right edge of my sword. Until one day, the revenge was over, the favor was over, and then I found that I had even cut the sky.