In 1960s, the Motion Picture and General Investments Limited produced a special set of romantic movies which was called Southern and Northern. The first one is "The Greatest Civil Wall On Earth" (1961), the second one is "The Greatest Wedding On Earth" (1962) and the third one is "The Greatest Love Affair On Earth" (1964). This set of movies were partly spoken in Cantonese and partly spoken in Mandarin. In this set of movies, they showed some differences between Northern and Southern, except the Languages, the movies also showed some kind of cultures, such as the wedding culture and the food culture. The main idea of this set of movies was a kind of cultural integration between Northern and Southern.