iPadOS 8.4 (build 12H4125a) is an official Apple over-the-air update for the iPad Air (China), released on 2015-06-09T17:53:03Z. The update package is 156.39 MB. This is a delta (partial) update that requires 8.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f1ee88c971b9e198bd33fd2763016d3d003f0209.zip.