Chinese prosody distinguishes between two tones, a “flat” and a “deflected.” In the first the syllable is enunciated in a level manner: the voice neither rises nor sinks. In the second, it (1) rises, (2) sinks, (3) is abruptly arrested. These varieties make up the Four Tones of Classical Chinese.[1]
The “deflected” tones are distinctly more emphatic, and so have a faint analogy to our stressed syllables. They are also, in an even more remote way, analogous to the long vowels of Latin prosody. A line ending with a “level” has consequently to some extent the effect of a “feminine ending.” Certain causes, which I need not specify here, led to an increasing importance of “tone” in the Chinese language from the fifth century onwards. It was natural that this change should be reflected in Chinese prosody. A certain Shēn Yo (A.D. 441-513) first propounded the laws of tone-succession in poetry. From that time till the eighth century the Lü-shih or “strictly regulated poem” gradually evolved. But poets continued (and continue till to-day), side by side with their lü-shih, to write in the old metre which disregards tone, calling such poems Ku shih, “old poems.” Previous European statements about Chinese prosody should be accepted with great caution. Writers have attempted to define the lü-shih with far too great precision.
The Chinese themselves are apt to forget that T’ang poets seldom obeyed the laws designed in later school-books as essential to classical poetry; or, if they notice that a verse by Li Po does not conform, they stigmatize it as “irregular and not to be imitated.”
The reader will infer that the distinction between “old poems” and irregular lü-shih is often arbitrary. This is certainly the case; I have found the same poem classified differently in different native books. But it is possible to enumerate certain characteristics which distinguish the two kinds of verse. I will attempt to do so; but not till I have discussed rhyme, the other main element in Chinese prosody. It would be equally difficult to define accurately the difference between the couplets of Pope and those of William Morris. But it would not be impossible, by pointing out certain qualities of each, to enable a reader to distinguish between the two styles.
Rhyme.—Most Chinese syllables ended with a vowel or nasal sound. The Chinese rhyme was in reality a vowel assonance. Words in different consonants rhymed so long as the vowel-sound was exactly the same. Thus ywet, “moon,” rhymed with sek, “beauty.” During the classical period these consonant endings were gradually weakening, and to-day, except in the south, they are wholly lost. It is possible that from very early times final consonants were lightly pronounced.
The rhymes used in lü-shih were standardized in the eighth century, and some of them were no longer rhymes to the ear in the Mandarin dialect. To be counted as a rhyme, two words must have exactly the same vowel-sound. Some of the distinctions then made are no longer audible to-day; the sub-divisions therefore seem arbitrary. Absolute homophony is also counted as rhyme, as in French. It is as though we should make made rhyme with maid.
I will now attempt to distinguish between Ku-shih (old style) and Lü-shih (new style).
Ku-shih (Old Style).
(a) According to the investigations of Chu Hua, an eighteenth century critic, only thirty-four rhymes were used. They were, indeed, assonances of the roughest kind.
(b) “Deflected” words are used for rhyming as freely as “flat” words.