Refers to the vowel ending in -n in pinyin. Mandarin has eight vowels * * * including an, ian, uan and uuml. Ann, En, Yin, Shang En, Umen. Pronunciation skills of nasal rhyme n: At the end of pronunciation, the tongue is close to the gums, and the tongue and gums in the mouth form obstacles and are completely occluded, and the soft palate droops to ventilate the nasal cavity.