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A modern poisonous killer travels back in time to an ancient peasant girl. She has a wolf mother inside and a bully outside. What should she do? Make a fortune by farming, get rich and do business! Pay me back everything you owe me! Use poison to treat medicine, practice medicine and refine medicine, and marry a handsome husband by the way. "The ancients said that the kindness of a drop of water should be repaid by the source. What I received was a life-saving grace. I should repay it with my own body. I hope the girl will not have second thoughts."