Hello @JiaqingPan ,
Toronto has been my home for many years and I am glad to see a Local Guide writing about it. I hope you enjoyed your visit there. 
If you have more photos or stories, I would love to see and read about them.
Also, @DanniS guessed right, I have been to Trillium Park many times and it is such a wonderful place. The residents of Toronto are so lucky to have it so close to the downtown area. I enjoyed going there to bike and you can easily rent if you do not have a bike.
I cannot seem to find any photos from Trillium Park at the moment, but I do have some from the Waterfront and the Toronto Islands. I will share them below.
Did you get the chance to visit the island? It should be in everyone´s bucket list when visiting the city.