iPadOS 9.3.1 (build 13E238) is an official Apple over-the-air update for the iPad Air (China), released on 2016-03-31T16:52:50Z. The update package is 1.17 GB. This is a delta (partial) update that requires 8.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 01c49695c20e57ac0508ae4c168cc422d9aecef1.zip.