Zi Collection, Page Position: Lower Radical: Person (rén) Page 94, Entry 01 The Zihui (Compilation of Characters) uses the two characters yi and yi to provide the pronunciation, which is read as yi (fourth tone). The Plain Questions (Suwen) states: if the pulse at the wrist is slow and rough, it is called jie yi. It is also a name for a medical condition in which one can eat but still lose weight, referred to as shi yi.