MV is Music Video, also known as audio and video, music video, promotion video, music video and music video. It refers to short films that are matched with music (usually mostly songs). Modern music videos are mainly made to promote music records.

illegal behavior is also called "invalid behavior". A kind of illegal behavior. Acts against the law. Different from the objectively illegal behavior, the actor is subjectively at fault when implementing the behavior, thus infringing the social relations protected by law. Subjective fault refers to intentional or negligent subjective state. According to the illegal nature, illegal acts can be divided into criminal violations, civil violations, economic violations, administrative violations, etc. According to the degree of harm to society, illegal acts can be divided into general illegal acts and serious illegal acts (crimes).