Sun Island Resorts is a spa and retreat type of deal with golf facilities, restaurants and conference stuff for business types. It shares an island with a 1200-year-old pagoda, the Mao pagoda, and might be a nice place for a rejuvenating break from the smog of Shanghai. They also have a smaller Mahota Farm
on-site -- a sustainable, organic farm, with a lake for fishing and a small petting zoo. You can visit for a day, pick your own vegetables, and eat a hotpot lunch for 380rmb. It's over near Zhujiajiao, the watertown.