iPadOS 9.9.12.1 (build 16B5089b) is an official Apple over-the-air update for the iPad Air (China), released on 2018-10-22T17:01:23Z. The update package is 2 GB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: e6441ac9cb3c3e1f709b129230b19e2c0b43ccb3.zip.