iPadOS 12.1 (build 16B92) is an official Apple over-the-air update for the iPad mini 2 (China), released on 2018-10-30T17:05:05Z. The update package is 1.16 GB. This is a delta (partial) update that requires 11.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: e176567dc99d54220e8dd8e95908e61800467449.zip.