The understanding of Alcatraz Island comes from a Hollywood movie, "The Brave Island." At the end of the film, Nicholas shouted at the fighters who came to the rescue. I have dreamed of this scene countless times. So I deliberately came to this place and chose to pay tribute to the idol in the same way. Alcatraz Island, also known as Akats Island, is located in the middle of the San Francisco Bay, less than two miles from Fishermans Wharf. It has been used by the US government as a federal prison, and has held many well-known heavy criminals, including "Capricorn Comet" Al Capone and "Acates Island Bird Man" Robert Stroud. Walking in the prison, the dim light in the cell contrasts sharply with the bright sunshine outside the window, which is frightening. Only when you experience the life of a prisoner on the island can you truly understand the value of freedom. Life is still ordinary, but looking at the seabirds flying freely in the sky, I feel cherished in front of me, after all, freedom is priceless.