Search for the Trademark Office in the browser, and click to enter the Trademark Office.

2. On the official website page of the Trademark Office, click the trademark online query.

3. The instructions appear, and then click I accept.

4. When an option appears, click the trademark comprehensive query.

5. Enter the name, take Baidu as an example, and click Query.

6. In this way, the trademark number can be found successfully.