android - What are the specific keys(platform.x509.pem and platform.pk8) used in Lenovo TAB A7-30HC

Question

What are the specific keys(platform.x509.pem and platform.pk8) used in Lenovo TAB A7-30HC, Im unable to used the system functions in which using these keys :https://github.com/android/platform_build/tree/master/target/product/security,

But some tabs do work with signing using these keys.

I tried:

Moving my system-signedapp to system/app and system/priv-app in lenovo tab specifically Kitkat, but i cant access system functions, It didnt gave me a system access.

How do I mitigate this?

Ive used these procedure to sign it

Signing my android application as system app

Answer 1

Waitting for answers