iPadOS 12.4 (build 16G5038d) is an official Apple over-the-air update for the iPad Air (China), released on 2019-05-28T17:07:01Z. The update package is 194.08 MB. This is a delta (partial) update that requires 12.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 5ce5f50f2ac6e07610b10ec87af56dfee8d37858.zip.