Du is a member of the youth gang. He is a respectable person. In the film, the role of "Mr" is described as a very mysterious figure. He seldom speaks, but his actions and words are full of strength and wisdom. This role is regarded as the epitome of Du, because his position and influence in Shanghai Beach are unparalleled.
Although the "Mr." in the film is not the real Du himself, the film "800" shows the historical and cultural features of Shanghai Beach through this role, so that the audience can have a deeper understanding of the people and things of that era.