Because at the beginning, all Hong Kong artists went to Taiwan Province Province to learn Putonghua, and Hong Kong people had no distinction between four tones. Together with "Taiwan Province provincial flavor", it is called "Hong Kong and Taiwan accent". The "Putonghua" in Taiwan Province Province is the fusion of the mainland Putonghua and the local "Minnan dialect" in Taiwan Province Province after the return of Taiwan Province Province for 45 years. Looking through the old Shanghai movies 49 years ago, we can find that the difference between Mandarin at that time and later Mandarin is very small, with four obvious tones, and the intuitive feeling is that the pronunciation is harder. But after arriving in Taiwan Province Province, it changed a lot. It has the following most obvious characteristics: 1. There are no light sounds in pronunciation and articulation. This is the biggest means to distinguish Taiwan Province islanders. Although light tone is not usually listed as one of the "four tones" in Chinese, it can distinguish semantics, so in pitch, light tone has the characteristics of sound zone and tone has the characteristics of curved arch. 2. The speech is not simple, and it is very serious. 3. You don't have to roll your tongue, and there are fewer rhymes.