Xu Collection, Upper Volume Radical: Metal (jīn) Entry: Sui Kangxi stroke count: 20 Page 1321, Entry 35 Broad Rhymes (Guangyun), Collected Rhymes (Jiyun), Rhymes of the Unified (Yunhui), and Correct Rhymes (Zhengyun) state the pronunciation is sui. It is the same as the character for burning mirror. Explication of Written Characters (Shuowen) writes it as a variant form. It refers to a yangsui, which includes items such as fire pearls and fire mirrors. Broad Rhymes (Guangyun) states it is an object used to obtain fire from the sun.