Guangyun (Guangyun) and Jiyun (Jiyun) provide the pronunciation as pi mei qie, with the same pronunciation as "bi". Guangyun explains it as being the same as "pi", referring to downward expulsion of gas. The Classic of Mountains and Seas (Shanhaijing) records: "The Eastern Beginning Mountain (Dongshi zhi Shan) originates the Mian River (Mian Shui). The Mian River is abundant with a type of fish called the Mian Fish (Mian Yu), which has one head and ten bodies. Eating it prevents [a condition]." The commentary explains: "It means the expulsion of gas." It is also written as (he fei). Additionally, Leipian (Leipian) provides the pronunciation as fang wei qie, with the same meaning. There is also the name of a type of beast. The Taikang Ji (Taikang Ji) records: "During the time of Duke Wen of Qin (Qin Wengong), someone in Chencang hunted a beast resembling a pig, but no one knew its name. On the road, they encountered two children who said: 'This beast is called 'Gu Wu Shu' (䊧勿述)'."