Rhymes of the Past (Guangyun) notes the pronunciation as fang-fei, while Rhymes Compiled (Jiyun) notes it as fang-wei, with the same pronunciation as "fei". The Jade Script (Yupian) explains it as the appearance of falling rain and snow. Additionally, in Yang Xiong's "Ode to Hedong" (Yangxiong·Hedongfu), there is the sentence "Clouds gather and come to meet." The commentary explains that "fei" is an ancient character for "fei".