I found a way to root the Meizu M3 mini. In this tutorial I will explain how you can root the M3 mini.
Search on the Play Store to the app “QuickShortcutMaker” and install it on your device.
Open the app and go to the tab “Activities” and scroll down and search for “User Center”.
Click on “User Center” and search for the following activity: “com.meizu.root.OpenSystemRightActivity” and click on it.
Now click on “Try” and now it will displays a windows where you can root your Meizu M3 mini. Click on “Accept” and then on "“OK”.
Now download the Kingroot application on the website: https://kingroot.net/ and then follow the steps in Kingroot for rooting your Meizu.
Well done! Now your Meizu M3 mini is rooted!