Any exceptional Chinese restaurants in or near Chinatown?
Chicago doesn't have as vibrant a Chinese population as SF has, so you may be hard pressed to find one that can stand head and shoulders to the Bay Area. Having said that, I do like Ken Kee, Sweet Station and Ming Hin. All are located within Chinatown Square. If you don't mind eating non Chinese food, Acadia is also nearby.
Agreed that SF has some great Chinese restaurants and a great Chinatown. But I am a big fan of all of Tony Hu's restaurants.
Lao Sze Chuan and Lao You Ju are my favorites. The Chrispy Shrimp at Lao You Ju is about the best shrimp dish I have ever had.