The method is as follows:

1. You need to choose a brand name suitable for the product. The brand name should be concise, easy to remember, relevant to your product, and not too similar to other trademarks.

2. Before submitting a trademark registration application, conduct a trademark query to ensure that the selected trademark name has not been registered by others. This can be done through the official website of the State Intellectual Property Office or the website of the trademark agency.

3. After determining the trademark name and completing the trademark search, you need to prepare a trademark registration application.

4. Submit the trademark registration application to the State Intellectual Property Office or the local Intellectual Property Office.

5. After submitting a trademark registration application, you need to wait for approval from the State Intellectual Property Office or the local Intellectual Property Office.