Dalian is a very nice city.Streets are clean and people are nice. Seafood is great,one of their specialty is sea cumber YUCK!
Take a trip to Russian street- Russian food and many side food kiosks and merchandise vendors.There Marine land( like a miniature Sea world) it is so so.
There are sightseeing boat trips cost a few bucks nice to go out on a hot day.Taxis are plentiful. Where are you staying?