I went here during December 2013 with family and a local of the area.
The entire park was very beautiful and filled with tangarine/mandarin trees as well as other flora as well as a few ponds making it a very peaceful place for relaxing. The main attraction of the park, of course, is the giant head statue of Chairman Mao at the tip of the island. There are mini trains that can take you to the statue (which I recommend because it's a very long walk).
There used to be a firework display every night which are said to be jaw droppingly amazing, but they have been stopped due to increased smog.