iPadOS 12.0 (build 16A5357b) is an official Apple over-the-air update for the iPad Air (China), released on 2018-08-15T17:06:16Z. The update package is 1.14 GB. This is a delta (partial) update that requires 11.4.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d0433acf7ea39384332753d1617482def5ce2be3.zip.