The method is as follows: 1. If you haven't signed the electronic signature of Qingyi Office, please click OK, and you can try to re-sign. Open the original document PDF that was originally downloaded and re-sign.

2. The original file has been replaced. You can log in to Shenzhen Market Supervision Administration again to download and submit a PDF signature. If you encounter problems that can't be solved, you can consult the customer service of Qingyi Office or consult the relevant local departments.