The word Ping Ping refers to the rhythm of poetry. To distinguish a flat tone, you must first know the four tones. Four tones are four tones in ancient Chinese. Tone refers to the level, fluctuation and length of sound. The tones of ancient Chinese are divided into four tones: flat, upward, far and progressive. "Ping" refers to the flat tone among the four tones, including Yin Ping and Yang Ping. "Wrong" refers to the mistake of four tones, including the upper, lower and middle tones. According to the traditional view, 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. Jade Tone, published in the Ming Dynasty, said: the tone is flat but not low, the rising tone is fierce and strong, the falling tone is clear and mournful, and the tone is short and urgent. Simply put, the key to equality is "inequality is equality". Pingping refers to the rhythm of poetry. Flat tone is an attempt to dualize the four tones. Four tones are four tones in ancient Chinese. Tone refers to the level, fluctuation and length of sound. On the basis of four tones, the flat tone is summarized through incomplete induction. Flat refers to straight, flat refers to twists and turns. In ancient times, it was raised, lowered, lowered, and the rest was flat. Since Zhou Deqing in Yuan Dynasty, Yin and Yang have been equally divided, with flat tone, flat tone, rising tone, falling tone and canceling tone. From ancient times to the present, the levels of balance are unbalanced, and the dispute between level balance and informal level balance is an eternal topic. The modern Chinese flat tone can be divided into four types: flat tone, rising tone, falling tone. In modern Chinese, the tones of ancient "Pingsheng" can be divided into Yin Pingping and Yang Pingping, namely the so-called first and second tones. In modern Chinese, the tone of the ancient "Shang Sheng" is partly disyllabic and partly Shang Sheng. Shangsheng is the third sound of modern Chinese Pinyin. In modern Chinese, the tone of "Qusheng" in ancient times is still the fourth tone. The ancient "Rusheng" tone no longer exists in modern Chinese. It has become a flat tone, a rising tone, a falling tone. The four tones of modern Chinese are Yin Ping (Shang Sheng), Yang Ping (Second Tone), Shang Sheng (Third Tone) and De Sheng (Fourth Tone). For example, in short, among the four tones in modern Chinese, the first and second tones are flat tones; The third and fourth sounds are ligatures. Four tones, four tones, here refers to the four tones of ancient Chinese. To know the four tones, the heart must first know how the four tones are formed. So let's start with the tone. Tone is the characteristic of Chinese (and some other languages). The tone of Chinese is composed of the ups and downs and the length of the voice, and the ups and downs are the main factors. Take Putonghua as an example, there are four tones: Pingdiao is a Gao Pingtiao (it is called Pingdiao if it doesn't rise or fall); The upper voice is a rising tone (not high or low); The rising tone is a low rising tone (sometimes a low flat tone); Voiced is a high tone. Ancient Chinese has four tones, but it is not exactly the same as Mandarin today. The four tones in ancient times were: (1) flat tones. This tone is divided into Yin Ping and Yang Ping in later generations. (2) on the sound. Part of this tone will become unvoiced in future generations. (3) sounding. This tone is still unvoiced in later generations. (4) if you are born. This sound is short. Modern Jiangsu, Zhejiang, Fujian, Guangdong, Guangxi, Jiangxi and other places still preserve the milk sheng. There are also many places in the north (such as Shanxi and Inner Mongolia) where raw milk is preserved. The tone of entering tone in Hunan is not short, but it also retains the tone category of entering tone. In most spoken languages in the north and southwest, the entering tone has disappeared. In the north, some entering tones are flat, some are flat, some are rising and some are falling. As far as Putonghua is concerned, the entering tone words become the most disyllabic, followed by the upper tone, and the upper tone words become the least. In the southwest dialect (from Hunan to Yunnan), the entering tone is changed to Yangping. What is the shape of the ancient four-tone ups and downs? Now we can't know in detail. Traditionally, the flat tone should be the middle tone, the rising tone should be the rising tone, and the falling tone should be the falling tone. The entering tone should be short. There is a Song formula in front of Kangxi dictionary, which is called "Four Tones Division". It says, "Don't go up and down, when the voice is loud, it is violent and strong; When the voice comes out, it is clearly mourning the distance; When the sound came in, it was short and urgent. This narrative is not scientific enough, but it also gives us a general understanding of the ancient four tones. The relationship between four tones and rhyme is very close. In rhyme books, words with different tones cannot be regarded as homophones. In poetry, words with different tones generally cannot rhyme. It is very clear in the rhyme book that what words belong to what tune. It is quite clear that a word belongs to a certain tone in Chinese dialects that still retain the tone of entering tone today. Pay special attention to reading one word and two words. Sometimes, a word has two meanings (often different parts of speech) and two pronunciations. For example, the word "for" is used as "because" and "for". In ancient Chinese, this situation is much more than that in modern Chinese. Now give a few examples: riding, flat voice, verb, riding; Disyllabic, noun, cavalry. Thinking, flat voice, verb, absence; Out of tune, nouns, thoughts and feelings. Fame, flat voice, verbs, praise; Disyllabic, noun, reputation. Dirty, flat voices, adjectives, filth; Voiced, verb, dirty. Number, consonant, verb, calculation; Disyllabic words, nouns, numbers, fate; Such as sound (read like new moon), adjective, frequent. Teaching, desensitization, noun, enlightenment, education; Life, verb, make, let. Command, silence, noun, command; Life, verb, make, let. Forbidden, silent, noun, forbidden, forbidden; Life, verb, can stand. Kill, Rusheng, transitive verb, kill; De-sounding (sounds like Sun), intransitive verbs, fade. Some words, originally pronounced in a flat voice, were later changed to disyllabic, but their meanings and parts of speech have not changed. Words such as "Wang", "Han" and "Kan" all belong to this category. " "Wang" and "sigh" have been pronounced in Tang poetry, and the word "Wang" always has pronunciation. There are more complicated situations: for example, when the word "Guo" is used as a verb, it is sometimes read twice. As for the use of nouns, when they are interpreted as wrong, they have to be read again. Distinguishing four tones is the basis of distinguishing flat tones. Next we will discuss the problem of leveling. Pingping knows what four tones are, and Pingping will understand. Flat tone is a term of poetic meter: poets divide four tones into two categories, flat tone is flat tone, and flat tone is three tones. Well, literally, it means uneven. What makes it possible to divide it into two categories? Because the flat sound does not rise or fall, it is long, while the other three sounds do rise or fall (the incoming sound may also slightly rise or fall), and it is short, so it forms two types. If these two tones are interlaced in poetry, they will make the tones diversified instead of monotonous. The so-called "sonorous voice" of the ancients is one of the important factors, although there are many stresses. How are the flat lines in poetry staggered? We can sum it up in two sentences: (1) Flat lines appear alternately in this sentence; ⑵ Flat lines and even lines are opposites in the dialogue. This kind of flat and even rule is particularly obvious in metrical poems. For example, the fifth and sixth sentences of Chairman Mao's poem "The Long March" say: Jinsha River is warm in the clouds and cliffs, while Dadu Bridge is cold on the crossbar. These two poems are flat: flat | flat | flat | flat | flat | flat | flat | flat | flat | flat | flat | flat | flat | flat | flat. As far as this sentence is concerned, every word has a rhythm. Pingping's sentence is followed by Xu Wei, followed by Pingping, and the last one is Xu Wei. When you start a sentence, it is flat, followed by flat, and finally flat. This is alternation. As far as sentences are concerned, "Jinsha" is flat to "Dadu", "Shuipai" is flat to "Qiaodu" and "Yunya" is flat to "Tiesuo". This is opposition. Regarding the rules of poetry, we will discuss them in detail from the following aspects: the rules of poetry, the rules of poetry. Now, let's talk about how to distinguish the level. If your dialect has an accent (for example, you are from Jiangsu, Zhejiang, Shanxi, Hunan and South China), then the problem will be solved easily. In those dialects with entering tones, there are more than four tones, not only yin and yang, but also yin and yang. Like Guangzhou Rusheng, it can be divided into three categories. It's all easy to do: just combine them, for example, combine the level tone and the level tone into a flat tone, and combine the above-yin, above-yang, out-yin, out-yang, in-yin and in-yang into a flat tone. The problem is that you must first find out how many tones there are in your dialect. It is necessary to find a friend who understands the tone to help. It would be better if you had learned the corresponding rules of dialect tone and Mandarin tone in Chinese class, and made clear the tone of your own dialect. If you are from Hubei, Sichuan, Yunnan, Guizhou and northern Guangxi, all the Rusheng words in your dialect belong to Yangping. In this way, we should pay special attention to Yangping characters, some of which belonged to Rusheng characters in ancient times. As for which words belong to entering tone and which words belong to entering tone, you have to look them up in a dictionary or rhyme book. If you are from the north, then the method of distinguishing flat tones is slightly different from that in Hubei and other places. Because most of the ancient entering tone words in Putonghua have become disyllabic, so disyllabic is also a disyllabic; The other part of the voice changed, and the voice was low. Therefore, the words from entry to change and from entry to change do not prevent us from distinguishing levels; Only when the entrance is leveled (Yin Ping and Yang Ping), it is difficult to distinguish leveled. We came across a place where rhyme was stipulated in the Law of Poetry, and the poet used a word that sounded very flat today, which aroused our suspicion. We can look it up in a dictionary or rhyme book. To sum up briefly, the five laws start from the same level: the first word and the second word of the first sentence are at the same level; The first word and the second word of the first sentence are at the same level; The second word in the first sentence must be at the same level; The second word in the first sentence must be at the same level; The first sentence rhymes with five laws; The first sentence doesn't rhyme. The first sentence of five poems rhymes. The first sentence of five poems rhymes but not rhymes. Flat and even (rhymes). Flat and even (rhymes). Flat and even (rhyme) Flat and even (rhyme) The first sentence rhymes with the first sentence. Flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat. Ping, ping, ping, ping, ping, ping, ping, ping, ping, ping, ping, ping. Rhyme, balance, balance, balance, balance, balance, balance, balance, balance, balance. As far as Hubei, Sichuan, Yunnan, Guizhou and northwestern Guangxi are concerned, there are basically no syllables such as ai, ei, ao and ou. In a word, the problem of entering tone is the only obstacle to distinguish flat tones. This obstacle can only be eliminated by looking up a dictionary or rhyme book; However, the truth of leveling is easy to understand. Moreover, about half of China is reserved for entering tone, so people in those places have no problem in distinguishing flat tones.