iPadOS 8.4.1 (build 12H321) is an official Apple over-the-air update for the iPad mini 3 (China), released on 2015-08-13T18:05:12Z. The update package is 429.34 MB. This is a delta (partial) update that requires 8.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 40b64fbc8fb8379a199b798d88e33d15ec561520.zip.