My girlfriend and I want to travel to Shenyang for about three days.

You'd better get off at Shenyang North Station. Not only going to the theater, there is a traffic crossing in front of the station, from which buses of more than 20 lines start, so you can go to larger places in the city, not to mention the Ai Wu market.

If you travel, go to Beiling Park. There are all kinds of humanities and nature.

There is also the Olympic Sports Center, which is far away, but it is definitely a good place.

Have a nice trip!