iPadOS 11.1 (build 15B93) is an official Apple over-the-air update for the iPad Air (China), released on 2017-10-23T17:01:41Z. The update package is 1.05 GB. This is a delta (partial) update that requires 10.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 2f3890e4a4e6ccb6f0d53fdf47edcd3728edce61.zip.