Wu Collection, Lower Volume Radical: Stone (shí) Character: bo Kangxi Strokes: 13 Page 831, Entry 42 Guangyun (Guangyun) pronunciation is bo. Jiyun (Jiyun), Yunhui (Yunhui), and Zhengyun (Zhengyun) pronunciations are bo. It describes a stone that can be fashioned into an arrowhead. Records of the Grand Historian (Shiji), House of Chu: A bo used for a new silken cord. Ma Rong, Ode to Guangcheng (Guangcheng song): The zeng and bo fly in the current. Originally written as pan. Also, according to Guangyun (Guangyun), pronounced po. It refers to a stone block used to tie a rope to an arrow. It is also pronounced pan.