The writing system of Cantonese is Chinese characters, the classification of Chinese characters is logogram in Linguistic studies. Which means one cannot directly notice the pronunciation of a Chinese character just by reading it, because Chinese characters did not show every single phoneme. Even if a beginner does not need to learn Chinese characters, a romanization system for Cantonese is still needed. There are about 19 initials, 53 finals, 6 tones in Cantonese. The numbers of these initials, finals and tones are limited, even the combination of them are limited.