iPadOS 8.2 (build 12D508) is an official Apple over-the-air update for the iPad mini 2 (China), released on 2015-03-09T18:49:04Z. The update package is 388.15 MB. This is a delta (partial) update that requires 8.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 40906ecba8a5b3a0bcd1b7d907abc10a0b4e2b11.zip.