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The State Trademark Office replaced the digital certificate with an invalid signature, so it is the same again.
The State Trademark Office downloaded a digital certificate, showing that the signature was invalid. Downloading is another solution:

1. Try to exit and re-sign.

2. It may be that the handwriting is not neat and the system cannot recognize it. Sign neatly.

Ask the computer department of the Trademark Office, and the staff will answer.

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