1. Unsupported file format: The file format required for JD.COM Allianz policy verification may be restricted, such as only supporting picture format and not supporting PDF format. You can convert the file into a supported format before uploading it.

2. File size exceeds the limit: JD.COM Allianz Insurance Company's policy verification limits the size of uploaded files. If the uploaded file exceeds the limit, it cannot be uploaded successfully. You can try to compress the file size before uploading.

3, network problems: uploading files requires a stable network environment, unstable network or uploading files is too large, will lead to upload failure. You can try to change the network environment or upload it on a more stable network.