iPadOS 12.3 (build 16F5148a) is an official Apple over-the-air update for the iPad Air (China), released on 2019-04-29T17:35:24Z. The update package is 348.14 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: 83177f7af3cf4c23568b54e1ee6f5a13561a56d6.zip.