The problem with performing root your phone Galaxy S5.

Hello,
I have a phone Galaxy S5. This is probably a Chinese fake, because it differs from the original device. I want to root it, but do not work any ways (to the original phone and fakes), which are presented on YouTube and forums. Eg. Using RootGenius phone runs a couple of times, and the root is not doing.
Very, very please help. You’re my only hope.

Sorry for my bad language. I use Google translator.