Whether a person is smart or not depends only on personal karma. If so, does Dr. Hua Tuo shave Zhuge Liang in the Three Kingdoms every day? Then why not shave off Liu Chan's hair and make him smart? I have to admit that scrapping is beneficial to the circulation of qi and blood in meridians, can stimulate menstruation and has the effect of refreshing the brain. Moreover, it has been said in the Han and Tibetan Scriptures that people who have no blood stasis in meridians or exogenous pathogens should not use this therapy, and their health should be based on individual fitness.