iPadOS 11.1 (build 15B93) is an official Apple over-the-air update for the iPad Air (China), released on 2017-10-23T17:01:47Z. The update package is 1016.33 MB. This is a delta (partial) update that requires 10.3.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b692e23be9fcf14fbaf2f50a0772cc73f63511cb.zip.