Acupuncture stone is a kind of medical device, so when you buy it, you should choose a regular product with a medical device registration certificate. Regular pharmacies (such as Tongrentang and other well-known pharmacies) and stone equipment stores usually provide stone products that meet the standards. When purchasing, it is recommended to carefully check the registration certificate number on the product package to ensure its legitimacy and reliability. When using the stone, it is important to follow the instructions on how to use the stone for proper operation. Attention should be paid to the time and strength of use to avoid causing harm to the body. If there is any doubt or discomfort, you should consult a doctor or professional for advice. The correct use of stone can play its medical role, but improper use may cause adverse effects on the body.