iPadOS 12.3 (build 16F5156a) is an official Apple over-the-air update for the iPad Air (China), released on 2019-05-10T17:08:15Z. The update package is 348.24 MB. This is a delta (partial) update that requires 12.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 89450ec76514ba50dcfb1ca4767a1f6ee2d23573.zip.