1/2-1 year with multiple entrances

I worked in Guangzhou for three years and held a Mainland residence which has expired on Dec, 15th. Currently I study in Hong Kong, but I would like to apply for a long term Chinese one, as I need to go to Guangzhou sometimes to see my partner's relatives or for some business purpose.

Do you think I have a chance to receive a 6months or 1 year one with multiple entrances? And which documents do I have to prepare?

I plan to apply in Wan Chai.

Thanks,
Marlene