Tso-chi Chang's Film "Ah Chung" is a realistic film, which is produced in the Spicit of Time (Zeitgeist) of Neo-realism in Taiwan in the 1980s. This film even attempts to blaze a new realistic trail. The leading role of this film, Ah Chung, is a juvenile from the bottom and margins of the society, the society called subaltern youth. This film uses the fixed frame of long take or long shot to describe a single screen. The background is set at Guandu Plain of Nature Reservation. Although it is a protected area, in reality is not fully protected. In fact, it reveals the gap between policy and implementation. Full black stop-motion screens are occasionally shown to signify the pauses and links of sections and respond to the margins of society of dark tonality in the entire film. The roles in the film use language and dialect to represent their family relationships and social strata. In addition, the faces and movements of Ba Jia Jiang are used to express the power of folk culture. Therefore, this film is actually significant in the film nistory for the Taiwanese.