There's a "Jinjiang" Sofitel pretty close to Century Park. My company put me up there once because we had a conference at the Pudong Shangri-La and it was cheap. Unfortunately, I wasn't particularly impressed with the hotel and I would have gladly traded away some of the amenities for a more convenient location; unless you're working long hours in Lujiazui or further out, there's really no reason not to stay east of the river (IMO).