iPadOS 12.1 (build 16B92) is an official Apple over-the-air update for the iPad Air (China), released on 2018-10-30T17:04:47Z. The update package is 310.5 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: 9ed70627dabf0b73efd1ec8ad9b47d3731cfaa67.zip.