Hey!
I’m kind of new here too – been living elsewhere in China for some time now, though.
In my experience you will have a hard time finding an apartment with the regular agencies if you’re only staying for 2 or 3 months. Most landlords don’t like that, too much hazzle for them.
But there’s something they call “hotel apartment” (not sure what the exact chinese is), apartments that you can rent by the day, month… Have seen one on ChuanXi Lu, but don’t know about the name/prices