iPadOS 11.2.5 (build 15D60) is an official Apple over-the-air update for the iPad Air (China), released on 2018-01-23T18:26:01Z. The update package is 150.56 MB. This is a delta (partial) update that requires 11.2.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b78ad455765f08a05dc1aa4c6c43cc8174bf1944.zip.