We all watch movies. Some watch it for entertainment, some watch it to pass the time. But some movies are embedded in our heads and cannot be easily forgotten. For me, “The Dark Knight” is just such a movie. If someone thinks it is an ordinary superhero movie, then they have to understand that they have not watched the movie carefully yet. This is not just a story of Batman's fight—it is a deep psychological struggle, of a person standing as a light in a dark city. Batman is not just a masked...