Wu Guojiang (1929-2016) was a cinematographer. In 1948, he was admitted to Dongying's fourth cadre training class. After graduation, he was assigned to Dongying as a photography assistant.
The events that take place on a city bus taken daily by workers, students, intellectuals, housewives and schoolchildren are depicted, and the lives of the two conductors, a hard-working young woman and an impatient and lazy man are contrasted.