Vowel er
er is a separate syllable, especially this vowel cannot be matched with any vowel or consonant.
er is equivalent to the word 'ai' in Vietnamese. When pronouncing the "er" vowel, you play the vowel 'e' first, then the tongue gradually bends up.
4. Raw vowel sounds
Music
The sound has a similar pronunciation in Vietnamese.
The sound is just behind the vowel.
Chinese consonants
In Chinese, the phonetic system has 21 consonants including 18 single consonants and 3 double consonants.