Moto Z is now getting Android 7.0 Nougat update in China also. Earlier few days back the update was rolled out in Europe. Now Coming back to China update, The update come with the software build NCC25.106-11.
The update weighs around 1.5GB in size. Along with Android 7.0 Nougat, Motorola has extended the support for Google’s Android-powered VR platform Daydream.  The update has just begin it will take time to reach each and every unit. So don’t panic if you did not get the notification yet.
To check it manually go to your phone’s setting>>about phone>>software update.