A neat costal port city to visit in September. As others have said the seafood is great there.

For sports, if you like 'golf' there is a Ocean course called "Dalian Golden Pebble Beach" & its a top course. the course & tourist park are just north of the city.
I would play golf there and skip the local tourist park, but i am a golf nut & enjoy any good ocean type golf courses here in china. Only played about a dozen courses here in China, but this is one of the best !. ( You can pick your caddy there)