I want to go to Dalian by myself and give some suggestions about hotels and scenic spots before I go home in July.

You must book a hotel. July is the peak tourist season. I suggest booking an express hotel (cheaper) to discover the kingdom, which is very suitable for people of this age. Very interesting! You can also go to polar museum in Tiger Beach, Xinghai Square, Dalian Xinghai Park, Haiyun, Jiangbei Bridge and Forest Zoo. (Not as good as your tiger garden. ) Lushun is far away. You can visit museums, snake museums and memorial towers, where you can see submarines through binoculars! If you go shopping, go to Qingniwa Bridge and Tianjin Street not far from the railway station!

I'm not from Dalian, but I've been to Dalian n times and I'm familiar with Dalian.