iOS 9.9.13.0 (build 17A6577) is an official Apple over-the-air update for the iPhone XS Max (China), released on 2019-09-19T17:07:56Z. The update package is 3.28 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: 3ec9ec8f8cec3d73fd0e3a67b7948538c155f33d.zip.