iPadOS 9.1 (build 13B5130b) is an official Apple over-the-air update for the iPad Air (China), released on 2015-09-30T17:58:07Z. The update package is 207.41 MB. This is a delta (partial) update that requires 9.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 3e5c39e98dc329f92f7137115226a4540c693cfe.zip.