iPadOS 12.1 (build 16B92) is an official Apple over-the-air update for the iPad mini 3 (China), released on 2018-10-30T17:05:28Z. The update package is 1.18 GB. 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: 444bb9655ba26550e09e14584e0d78e07176323b.zip.