Light tone is the weakening of the whole syllable. Due to the relaxation of vocal cords and oral muscles, the pitch is lowered, the sound length is shortened and the sound intensity is weakened. In addition to losing the original tone, the initials and finals have also changed to varying degrees. In terms of initial consonants, the shortening of sound length often leads to unventilated, clear and turbid initial consonants and clear and turbid initial consonants.
The syllables in pinyin are the basic units of pronunciation, and the pronunciation of any word is broken down into syllables to read aloud. Vowels are particularly loud. A vowel phoneme can form a syllable, and a vowel phoneme combined with one or more consonant phonemes can also form a syllable. Generally speaking, vowel phonemes can form syllables, while consonant phonemes are not loud enough to form syllables.