The order of the 50-degree series is fifty shades of grey, 50-degree darkness and 50-degree flying. The first film "fiftyshadesofgrey" was released on February 3, 2005+2065438. It tells the story of love at first sight between Anna Stasija Steele, a female college student, and Christian Gray, a young entrepreneur, and the complicated relationship that followed. The film delves into the themes of power games, trauma and emotional dependence. The second film "Fifty Shades Dark" was released on February 20 17 10, continuing the story of Anna and Christian. This time, the relationship between them became deeper and more complicated. This film shows how to overcome the shadow of the past and how to deal with new challenges and threats. The third film "fiftyshadesfreed" was released on February 9, 2008+2065438. As the last chapter of the series, this film describes the married life of Anna and Christian, and how to protect their love and life in the face of external threats. Fifty Degrees series is a popular movie trilogy in the world, which is adapted from El James' best-selling novel of the same name. This series has attracted wide attention for its unique interpretation of sm theme and description of romantic love stories.