The heavy rain hit the iron roof of the abandoned factory, and the crackling sound was like countless thin needles, which made Shao Tian's temples throb. He huddled under the rusty conveyor belt, his soaked clothes clinging to his skin. His teeth were chattering with the cold, but he didn't dare to make any move. On the street three kilometers away, the night watchman's tracking dog was still barking. The sound penetrated the rain and was like a dull knife repeatedly cutting his tense nerves.