The seafood restaurant on Gongyuan Road, Lao Xiao Pickles 2nd Street, Qiao Xiaoer BBQ on 6th Street (the seafood in Lingxi is good). There are many roadside stalls in an alley next to the Awa Shanzhai People's Hospital next to Shuijing Park, including fried mutton barbecue with green onions.
Beef soup and other late-night snacks. Many roadside stalls sell offal, which is also delicious. I highly recommend the areas around Lingxi: Puping roast goose, Huayang beef pier spring rolls, too many to mention.