Zi Collection, Middle Volume Radical: Fire (huǒ) Page 740, Entry 06 Guangyun (Broad Rhymes) and Jiyun (Collected Rhymes) define the pronunciation as fen; the sound is identical to the character fen. In the Lunheng (Balanced Discourses) by Wang Chong, it is stated that in the middle of the body the skin burns and scorches. In the Yupian (Jade Chapters), it is written as the original form of fen.