iPadOS 12.3 (build 16F5156a) is an official Apple over-the-air update for the iPad mini 2 (China), released on 2019-05-10T17:08:17Z. The update package is 348.25 MB. This is a delta (partial) update that requires 12.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 8346c5b46012e0ce8f9ef20bd30bdd4800ff613a.zip.