The format for filling in the Doudian trademark registration number:

When filling in the Doudian trademark registration number, you need to find the specific number on the trademark registration certificate and fill it in according to the following format:

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Trademark registration number: [Registration number of Doudian trademark]

Please ensure that you enter the trademark registration number accurately to avoid subsequent errors or delays. The trademark registration number is usually a series of numbers and can be found on the trademark registration certificate.

If you have questions or are unsure about the specific format of the trademark registration number, it is recommended to consult the trademark registration certificate or consult a professional trademark agent or legal professional to obtain accurate information.

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