"Flat" is straight, and "flat" is tortuous. There are four tones in Middle Chinese, which are called Ping, Shang, Qu and Ru. Except for the flat tone, the other three tones have high and low changes, so they are collectively called Legato.
The entering tone of Putonghua disappears, and the entering tone is classified as that the upper tone and the lower tone are in oblique tone and the upper tone is in oblique tone, which leads to errors in judging the horizontal tone of poetry in Putonghua.
Extended data
1, leveling in ancient China.
The tones of ancient Chinese can be divided into four tones: flat, up (sh m 4 ng), falling tone and entering tone. "Flat" refers to the flat sound in the four tones; "Wrong" refers to the mistake of four tones, including the upper, lower and middle tones.
2. Tradition
According to tradition, a flat tone is a flat tone, a rising tone is a rising tone, a falling tone is a falling tone, and an entering tone is a short tone. In the Ming Dynasty, jade melody was released.
Flat voice, flat road, mo di ang,
The voice above shouted fiercely and strongly:
It's a long way to go, Xiu Yuan,
The urgent voice is short and urgent.
Simply put, the key to equality is "inequality is equality".
Baidu Encyclopedia-Pingze