Zhengzitong states that this character is the same as the character for a large drum (fen), being a simplified form resulting from a corruption. For a detailed explanation, refer to the commentary under the character for a large drum (fen). Tangyun, Jiyun, Yunhui, and Zhengyun all record its pronunciation as fen (level tone). Shuowen Jiezi defines it as a large drum. Erya: Explanation of Music states that a large drum is called a fen. Guo Pu's commentary notes that such a drum is eight feet long. The Rites of Zhou: Office of Earth records that the drum master used the fen drum to direct military operations. In ancient times, the character for energetic (ben) was also used to represent it. The Book of Odes (Shijing), Great Odes mentions the phrase, The large drum is sonorous. This character is also written in the variant forms (zhuan) and (zhuan). Zi Collection, Page Position: Upper Radical: Drum (gǔ) Page 1076, Entry 01