1. Legitimacy of trademark: Yishengkang Membrane is a health care product trademark under Guizhou Miao Yi Biotechnology (Group) Co., Ltd., and the legitimacy of the trademark is examined and registered by the State Trademark Office or relevant institutions. The trademark of Yishengkang film has gone through legal registration procedures and obtained the trademark right, so it is legal in trademark use and protection.

2. Legitimacy of the product: Yishengkang membrane is the application of Miao Yi's traditional health care concept in pain external health care products, and its main product is Tongluo Shang Tong membrane. In most countries, including China, health products must be approved and supervised by relevant departments to ensure their safety and effectiveness. Yishengkang membrane products have gone through the legal examination and approval procedures, obtained the approval of relevant departments, and their business and sales are legal.