The layer between the skin and meat of sweet potato does have anti-cancer effect. I saw it on a program like Yangshengtang. If I remember correctly, it is mainly aimed at first-line cancer and related to the treatment of diabetes. Fu Ronghai's sweet potato rice has never been heard of. Everything is cured at once. So far, none of it is true. Why do you need to invest so much money to research anticancer drugs? Some of those stubborn people are fooled by lack of knowledge, and some may be helpless with the mentality of trying.