iPadOS 12.1.1 (build 16C50) is an official Apple over-the-air update for the iPad mini 3 (China), released on 2018-12-05T18:08:02Z. The update package is 1.23 GB. This is a delta (partial) update that requires 11.2.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 19b61dc4178c94e94fa04347eef3ff9fefdc00b6.zip.