the trademark registration number is a digital coding system on the trademark registration certificate, which is used to identify the status and related information of trademark registration. The trademark registration number consists of numbers and letters, with 9 or 1 digits. In the trademark registration number, the first four digits indicate the number of the trademark registration bureau, which is used to identify the country, region or organization where the trademark is registered. The following figures indicate the specific date and application number of trademark registration.