iPadOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPad mini 3 (China), released on 2018-05-29T17:14:03Z. The update package is 612.2 MB. This is a delta (partial) update that requires 11.2.6 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 83c9f893a704a2fcb6ebf12257406cc51118c3a9.zip.