Zhuyin was made to closely represent the sounds of Mandarin Chinese. Symbols are divided into two categories, the initials (the first sounds in a syllable) and the finals (the main vowel, the glide consonants ([y/i; IPA:/j/] and [w/u; IPA:/w/]) that come before the main vowel and all the sound that comes after it). There are 4 tone marks to represent the 5 Mandarin tones.