Soul Bidding: Selling Humanity for 3 Yuan at the Start

Lin Mo, a middle-class man, met a strange man when he got off work one day and offered to spend 3 yuan to buy the cigarette he was smoking. Lin Mo ignored him and left. Three days later, Lin Mo met the strange man again. This time he offered to spend 30 to buy Lin Mo's breakfast at the expense of Lin Mo's hunger. Lin Mo still refused. Three days later, Lin Mo met the man again. This time he offered to buy Lin Mo's power bank for 300 yuan at the expense of Lin Mo's cell phone being out of power. Lin Mo agreed. Three days later, the mysterious man wanted to spend 3,000 to buy Lin Mo's shoes at the cost of Lin Mo going home barefoot, and Lin Mo agreed. Three days later, the mysterious man wanted to buy Lin Mo's dog for 30,000. The price was that Lin Mo would kill the dog himself, and Lin Mo agreed. Three days later, the mysterious man wanted to buy Lin Mo's child of unknown origin for 300,000. Lin Mo hesitated and did not agree, but took the child for a paternity test. Three days later, the mysterious man wanted to spend 3,000,000 to buy Lin Mo's parents, who he considered burdensome. Lin Mo hesitated until the third day and agreed. Lin Mo's parents died in an accident. After that, the mysterious man wants to spend 30 million to buy Lin Mo to kill his wife...