In the winter of 1999, a white-haired old man huddled under an overpass in Dongcheng District, Sijiu City, and the snow on his body was shaking. A group of wild dogs were roaming not far away. Suddenly the snow on the old man's body stopped shaking, and a wild dog came forward and probed with its paws. Seeing that the old man had no reaction, it was ready to swarm him. At this moment, a thin, hunchbacked, horse-faced old man came under the bridge and rushed out...