Imbion

…The Middle Chinese phonetic system has been reconstructed from the rhyme books (books that classify characters by phonemes for poetry, such as Qiyun and Guangyun) and rhyme diagrams (books that diagram the rhyme books, such as Yunjing and Shichiyinlue), as well as modern Chinese dialects, Japanese, Korean, and Vietnamese Chinese characters, loanwords from other languages, and phonetic notations (Phas-pa script, Roman alphabet, etc.). The structure of one character, or one syllable, is an initial consonant (hereinafter abbreviated as I), a medial sound (abbreviated as M), a main vowel (abbreviated as V), and a final sound (abbreviated as F), in that order, and the whole is covered by a tone (abbreviated as T), forming an IMVF/T form. However, F, M, and I (depending on the interpretation) may not be present, and there may be multiple Ms. …

*Some of the terminology explanations that refer to "final consonants" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…中古中国語の字音体系は，当時の韻書(詩作のために文字を音韻によって分類した本，《切韻》《広韻》等)や韻図(韻書を図式化した本，《韻鏡》《七音略》等)，および現代中国諸方言，日･朝･越(ベトナム)漢字音，他言語中の借用語，字音表記(パスパ文字，ローマ字等)等によって，再建reconstructされたものである。　その1字，すなわち1音節の構成は，頭子音Initial(以下Iと略)，介音Medial(同M)，主母音Vowel(同V)，韻尾音Final(同F)の順に単音が並び，それら全体に声調Tone(同T)のかぶさるIMVF/Tの形をとる。ただしFやM，(解釈により)Iはないこともあり，またMは複数の場合もある。…

※「韻尾音」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報