What if I'm already in China?

I've been living in China for two years, currently I hold a X1 (with a residence permit, of course). I got married last week (she is a local girl, we've already got the Chinese marriage certificate).
In this article you've explained how to get a Q1 if you are currently living in your own country. So my question is, what should I do if I already stay in China? My student residence permit will expire at the end of July (i.e. after my graduation) and before it happens I would like to obtain a "family reunion" residence permit without leaving the country. In this case I can go directly to the Exit-Entry Administration Bureau of the city I live in, right? If yes, which documents I need to take with me when meeting with them?
Thanks in advance!