iPadOS 12.1.3 (build 16D39) is an official Apple over-the-air update for the iPad Air (China), released on 2019-01-22T18:04:15Z. The update package is 283.51 MB. This is a delta (partial) update that requires 12.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 5f70ccee0af7e1100b3360bf086f86853078ab88.zip.