The Past Events of the Northeastern Expedition

My name is Zhang Lei. Grandpa said that the day I was born, it snowed heavily in the sky. The snow outside the health center was actually covered with large, twisted snakes. He said that I have been destined to snakes my whole life. As we all know, snakes are cold-blooded animals. They will certainly not come out in winter, let alone crawl on the snow. I have always regarded this matter as a story that my grandfather coaxed me to make up. Until one day, when I went up the mountain to play, I encountered a big snake more than ten meters long. The big snake stood upright and stared at me. I was so frightened that I turned around and ran away. However, from that day on, I started to have a fever, which lasted for more than ten days.