Uploading Temporary Asset:
For instance, when sending several pictures or videos, these files will need to be uploaded somewhere while waiting to be fetched by the client.
Fetch Temporary Asset:
This API lets Official Accounts download temporary assets given
Upload Permanent Asset:
Aside from temporary assets that expire 3 days after upload, developers can also create permanent assets, which can be modified or deleted at their later convenience.
Delete Permanent Asset:
After adding a permanent asset, the developer can use this API to delete it and save space.