iPadOS 12.1 (build 16B5068i) is an official Apple over-the-air update for the iPad Air (China), released on 2018-10-02T17:11:29Z. The update package is 233.94 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: c89c84d99b77e430bd142ec67fd5ba0709fe427e.zip.