D Visa

Dear All,

I am Pakistani national living in China since 2005. I was a student in a reputable university in China on X (from 2005-2009). I am working as an engineer in a multi national firm on Z (from 2010- till today).
I want to apply for something permanent residence since I am going to buy my home within couple of days.
I have heard there is a option as D applicant. Is it possible for me to apply for that? If yes, then please advise documentation and place for application?
Or
Is it possible to get Chinese passport?