snake oil salesman cuts own finger to make case, what do you think about it?

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a man in GUIyan , capital of Guizhou province, tried to demonstrate the power of his homemade mediine by cutting his own finger and dousing it with the product. the man has no license to sell any medicine but went on the sidewalk to hawk his invention. the display surprised some people , others were scared by the blood, while some were skeptical.