Reasons for failure to upload Chinese consular signatures:

1. File format problem: The uploaded file format may not be supported by the system. It is recommended to check whether the file format is correct. If you are not sure, you can Try converting the file to a commonly used format such as PDF or JPG, etc.

2. File size problem: The uploaded file size exceeds the system limit. It is recommended to reduce the file size or split the file to meet the system requirements.

3. Network problems: The network may be unstable or interrupted during the upload process. It is recommended to check whether the network connection is normal and try to upload again.

Uploading is to transfer information from a personal computer (local computer) to a central computer (remote computer) system so that everyone on the network can see it.