"Internal Organ Cleaning " is an exceptionally profound Buddhist practice. It aims to eliminate negative energy and enhance physical and mental well-being through the cleansing of both body and mind. According to the Biographies of Eminent Monks, the legendary monk Fotucheng once washed his internal organs in a river to inspire people to cleanse the impurities of their hearts. For centuries, this tale has been regarded as a myth. However, a real-life story sheds light on the profound meaning and potential of this Buddhist practice.