In the "Guangyun" and "Jiyun", the pronunciation is noted as wu kuai qie, sounding the same as "kuai". The "Yupian" explains it as the meaning of panting. Also, in the "Guangyun" and "Jiyun", the pronunciation is noted as wu wai qie, sounding the same as "hui". The meaning is the same. Also, in the "Jiyun", the pronunciation is noted as hu wai qie, sounding the same as (missing character). It refers to nasal exhalation. Also, the pronunciation is noted as huo kuai qie, sounding the same as "huo". It refers to breathing.