 With box office earnings of over ¥50 million, "Cell Phone" became the highest-grossing domestic film in 2003.Written by Liu Zhenyun, based on his own novel of the same title, the film revolves around two successful men whose marriages were wrecked when their wives uncovered their extramarital affairs through traces left in their cell phones.More broadly, the film explores the role of cellphones in interpersonal complex relationships in modern China, where rapidly expanding use of information technology impacts the way people communicate.