Light is the most important element in a film, and lighting is the most important element in film creation. From the performance of environmental atmosphere, light is used to reflect the inner state of the characters, and the shooting of light is very particular. Many scenes of Wei Tong and Simon are in a dark space. The lights on their faces are bright and dark, and the contrast is very strong. In the dim light, it means that their homosexual relationship cannot be made public, which increases their life pressure. At the end of the film, Wei Tong's father raised his hands during the security check. This action has profound implications, and Tai Chi, a symbol of integration, is used to express the mutual blending of Chinese and Western cultures. The ending is flowing and profound.