On My First Day of Employment, My Body Was Lying at My Workstation

On my first day on the job, the body of my former supervisor was lying on my desk. He looks exactly like me, only twenty years older. He opened his eyes and said three words to me: "Don't be afraid, I am the sixth supervisor and you are the seventh." "You think you're helping your clients untie their knots." "You're actually feeding it." After that he disappeared. Su Wan rushed in: "Who were you talking to just now?!" I looked down at the file, and the record numbered 0 was disappearing line by line. In the end there is only one line left: "Get out for us." - I don't know what "it" is. But I know that if I can't get out, the next person lying on this workstation... Is myself.