反ㄈㄢˇfǎn切ㄑㄧㄝˋqiè

古人切語之法，用二字以求一字之音，上字與所切之字雙聲，下字與所切之字疊韻；上字以定清濁，下字以定平上去入；如「東，德紅切」、「反，甫晚切」。

英traditional system expressing the phonetic value of a Chinese character using two other characters, the first for the initial consonant, the second for the rhyme and tone

法fanqie, ancienne méthode de transcription phonétique