No. It is clear that Class III medical devices cannot be used for group buying on Douyin. According to Article 27 of the Regulations on the Supervision and Administration of Medical Devices, entities and individuals that produce, sell, and use medical devices in accordance with the provisions of laws and regulations shall apply for licenses or filings in accordance with the law, as well as relevant certificates such as business licenses. However, Class III medical devices have a wide range of uses, mainly including in vitro diagnostic reagents, vascular interventional devices, extracorporeal circulation devices, skin products, etc. Some of them have certain risks when used, so they cannot be directly used for group buying on Douyin. In order to protect the health rights and interests of the public, companies that produce and sell medical devices shall abide by relevant laws and regulations, and obtain licenses or filings as required to ensure product quality and safety. When purchasing medical devices, the public should also pay attention to checking the product's licenses and quality certifications, and never trust illegal sales channels.