iPadOS 9.3.1 (build 13E238) is an official Apple over-the-air update for the iPad Air (China), released on 2016-03-31T16:53:03Z. The update package is 23.13 MB. This is a delta (partial) update that requires 9.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 07cda2d1c1c399f912e618b00ddec4ad7c536c03.zip.