Star is based on my sense.
The worlds 50 best also entry the restaurant in Shanghai!
http://www.theworlds50best.com/
Liquid laundry ★★★★★
Belgian beer cafe ★★★★
Mr.Pancake House ★★★
Piro (近常熟路) ★★★
Time out Shanghai says, try the top-value Classic Hamburger (48RMB), filled with cheese, crisp, lettuce, tomatoes and Piro’s ‘secret sauce’..
Kabb Bistro bar ★★★☆
Bella Napoli (近静安寺) ★★★★☆ Professional pizza.
Da Marco ★★★
Bistro Burger ★★★★
You can challenge on the burger fighting.