Hai Collection, Lower Volume Radical: Tooth (chǐ) Entry: jin Kangxi strokes: 28 Page 1536, Entry 19 Compendium of Phonology (Jiyun): Pronounced jin (falling tone). To close the mouth. Also, Compendium of Phonology (Jiyun) and Categorized Compendium (Leipian): Pronounced jin (falling tone). Compendium of Phonology (Jiyun) states that teeth that are curved inward are called jin.