Official documentation and community testing indicate that KingRoot generally only works for devices running Android 2.0 to Android 5.1 .
It does not work on Android 9 Pie for 99% of mainstream devices. Trying to force it exposes you to malware, data theft, and bricked devices. king root android 9
This article provides a 360-degree look at using King Root on Android 9 Pie, covering the technical hurdles, step-by-step attempts, risks, and the best current methods to achieve root on Google’s ninth major Android release. covering the technical hurdles