iPadOS 12.1 (build 16B5089b) is an official Apple over-the-air update for the iPad Air (China), released on 2018-10-22T17:01:22Z. The update package is 329.6 MB. This is a delta (partial) update that requires 12.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 97794d9f4a430f3380d574a5e24c88045893e9a7.zip.