iPadOS 9.3.1 (build 13E238) is an official Apple over-the-air update for the iPad Air (China), released on 2016-03-31T16:53:01Z. The update package is 284.28 MB. This is a delta (partial) update that requires 9.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 96a5f87681fe47c6ebf2b31bb22efb787944e894.zip.