iPadOS 12.1.3 (build 16D5037a) is an official Apple over-the-air update for the iPad Air (China), released on 2019-01-07T18:06:18Z. The update package is 220.87 MB. This is a delta (partial) update that requires 12.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 585b651b3ec3bf4f4225963ab42877204c28e726.zip.