You can use the Tianyancha app to check the authenticity.

The name of the applicant for the trademark "Shield" is Hubei Renyuantang Pharmaceutical and Bioengineering Co., Ltd., and the trademark is currently invalid.

Common anti-counterfeiting query methods are:

1. Network query: Check the anti-counterfeiting label on the product, follow the prompts on the anti-counterfeiting label, and enter the anti-counterfeiting code to check the authenticity.

2. Telephone inquiry: For mobile phones or landlines, please dial the prompt number on the anti-counterfeiting label and enter the anti-counterfeiting code in sequence according to the voice prompts for verification.

3. SMS query: Edit the "20-digit or 16-digit anti-counterfeiting code" on your mobile phone and send it to the prompt number on the anti-counterfeiting label to obtain the authenticity information of the product you purchased.

4. WeChat query: Open WeChat on your mobile phone and use the scan function of WeChat to point to the QR code on the anti-counterfeiting label to query.