Coming to the World of Turtle Soup, Luckily I Am a Detective

My name is Zhang San, I am a detective I am a lone wolf, there is nothing I don't want and nothing I can't get. But I overturned. I met a tortoise who said that I could be resurrected as long as I became the Soup God before the first seven days. Then I had to become the Soup God. Therefore, I need to kill ten thousand people within seven days. (Not Brainless, Heroes, Farewell Virgin, Turtle Soup)