What is the tone symbol?

Pinyin tone refers to the tone in Putonghua, which is usually called four tones, that is, even tone (the first tone), and is represented by "ˉ", such as lā; The second sound of the upper voice is represented by "ˊ", such as lá; Phonetically (the third sound), it is represented by "ˇ", such as l m:de-voudent (the fourth sound), represented by "ˋ", such as; Pull.

Tone symbols are marked on the main vowels of syllables. Don't underestimate. For example: Ma mā (flat tone), Ma má (rising tone), Ma Mǐ (rising tone), Ma mà (falling tone), Ma mɑ (softly).

Tone label:

Tone symbols are marked on the main vowels of syllables "The main vowel is the main vowel, which is the rhyme belly of the vowel." There are a, o and e vowels, and a, o and e are the main vowels.

When the vowels are single vowels I, U, U, I, U, U are the main vowels, and after the vowels iou, uei and uen are omitted as iu, ui and un, the vowels O and E disappear. The customary method now is to mark the last vowel letter, that is, to mark the U of iu and the I of ui. Un is of course marked on u.

To mark the tone, you must first pronounce the pronunciation correctly so as not to mark the wrong number. But in the case of accurate pronunciation, please remember that there is a rule for tone labeling: all tones are labeled on vowels, and there are certain requirements for which vowel to label.

For example, aoeiu is generally marked according to the size of the opening, and it is marked above the big opening, but iu is special. When the two are together, they are marked on the latter.

Refer to the above? Baidu encyclopedia-pinyin tone