Harbin Ice & Snow World
This is to be visited at night because the ice sculptures will be lit-up with colourful lights. Do note this is different from the one mentioned earlier. Both places are near each other, hence I would recommend doing the snow sculptures in the day and the ice sculptures at night. If possible, do get there early because there will be a massive queue at the ticket booths.
Central St or better known as Zhong Yang Da Jie is the main shopping district in Harbin. This is where the buildings are a pretty sight because of its Russian influence. It is a long street of little eateries, restaurants (both Chinese and Russian), souvenir shops, cafes and what have you. Basically, if you are a foodie you will love this street. Personally, I didn't get sick of walking this street even though I visited it almost every day during my stay in Harbin.