iPadOS 11.3 (build 15E5211a) is an official Apple over-the-air update for the iPad Air (China), released on 2018-03-12T17:05:23Z. The update package is 195.26 MB. This is a delta (partial) update that requires 11.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b46e932c725e0f54066e04e5cdc529daba9db8de.zip.