A57 and R9s series, the mechanisms of these two versions are very close. We usually brush any version of Magisk system.

It will prompt that it is damaged and cannot be started. Even if you are authorized by SuperSU, you should also brush the version that needs to be modified, because OPPO is right.

There is a new signature-like thing on the boot 1 layer, so mask root is not supported, and you can only brush the customized version of Supersu, or

The user directly brushes the package with ROOT in ROM Paradise.