iPadOS 11.4 (build 15F5049c) is an official Apple over-the-air update for the iPad mini 2 (China), released on 2018-04-16T17:07:29Z. The update package is 182.84 MB. This is a delta (partial) update that requires 11.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 728c8f7d549402d0d5b303105fdf54cd40eca519.zip.