Red sand ginger is not kaempferol. There are pictures to prove it: (This is what we call red sand ginger that affects the genitals. It is said that it can make the genitals smaller. When I was a child, there was a man called red sand ginger in the village. Also known as red sand ginger, the reason is that this woman wanted to divorce her husband, but divorce was not so easy in the 1970s, so she used red sand ginger to rub her husband to make him smaller, but later it was revealed that he did not rub it Success, but he was nicknamed "Hongshajiang". This is a true story)