1. Inquire directly through the trademark registration certificate issued by the Trademark Office. There is a number in the upper right corner of the trademark registration certificate. This number is both the trademark application number and the registration number. Log on to the website of the Trademark Office of the People's Republic of China and the State Administration for Industry and Commerce and enter the trademark inquiry interface. Follow the relevant text prompts and enter the registration number. Generally, trademark applicants with registration numbers can choose comprehensive inquiry or status inquiry to view trademark information.

2. You can directly go to the Trademark Office to submit an application for trademark inquiry, and pay the trademark inquiry fee to conduct the inquiry.

3. You can also entrust a regular trademark agency registered with the State Trademark Office to inquire about the trademark registration number. At the same time, pay the corresponding inquiry fee.