iPadOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPad mini 2 (China), released on 2018-05-29T17:13:39Z. The update package is 581.48 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: f9ad3d512ce7e75ad613fe99d04df99d31c3c348.zip.