When analyzing the composition of syllables, why are there two methods of analyzing consonants, vowels and rhymes?

When analyzing the composition of syllables, why there are vowels, rhymes, vowels and consonants

Vowels and consonants are a common classification in international phonetics, which is divided according to the characteristics of the pronunciation of the factors; there is also such a division in Chinese phonetics, but it is usually used in the traditional classification, which is based on the structure of the syllable, divided into consonants, rimes, and tones, with the consonants being the front of the syllable (b p m f), and the rimes being the back of the syllable (a ai an ). The vowel is the part of the syllable in front (b p, m, f), and the vowel is the part of the syllable after the syllable (a, ai, an). These two pairs have a cross relationship because they are divided in different ways.

Vowels and Rhymes: In Chinese, most of the rhymes are made up of vowels, but there is no one-to-one correspondence between rhymes and vowels. Chinese vowels have 10, and there are 39 rhymes, according to the structure is divided into monosyllabic rhymes (10, filled with monosyllabic sounds, such as a o e i u ǖ), diphthongic rhymes (13, consisting of two or more vowels, such as ao ou iu), nasal rhymes (16, consisting of vowels + consonants, such as an ang). It is clear that a vowel is a sound (professionally called a phoneme), whereas a vowel is not necessarily a sound. Rhymes also contain the consonants n and ng (as endings).

Consonants and consonants: consonants are made up of consonants, but they do not correspond to each other. There are 22 consonants in Chinese and 21 consonants, the difference being ng, which is a consonant and can be used as a rhyme, but not as a vowel. There is also a special n, which can be either a vowel before a syllable or a rhyme (nan) after a syllable.

In summary, it is certain that a sound is a vowel or a consonant, but whether it is a consonant or a rhyme depends on where it occurs in the syllable structure; and the intersection of the two concepts lies in the n and the ng.

Also, part of the reason for the development of the Hanyu Pinyin program was the adoption of the Latin alphabet in order to be in line with international linguistics. However, there are also some differences between the pronunciation of the sounds and the letters. For example, the letter a actually represents several sounds, and the two-letter ng actually represents one sound [?] .