How to root / update the fake Lenovo P780W

I tried searching for a guide to root the 'lenovo' P780 w model - but this model doesn't seem to appear in the various lists of devices which can be rooted (such as this one).

I'm guessing that this is because the phone is a fake.

So my question is basically:

1) Is there a safe way to root this fake phone and

2) If there is - is there a custom ROM for this phone so that I can update the operating system and Android version from 4.2.2 jellybean to 4.4 or higher?