iPadOS 9.3.1 (build 13E238) is an official Apple over-the-air update for the iPad Air (China), released on 2016-03-31T16:52:54Z. The update package is 1.09 GB. 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: 3f3a9781bf00fc398c1d1c18c5f02725408a42cc.zip.