Xu Collection, Upper Volume Radical: Metal (jīn) Biao; Kangxi strokes: 23; Page 1326, Entry 09 Pronounced biao. In Explaining Graphs (Shuowen), it refers to a horse's bit. In Correct Rhymes (Zhengyun), it is also called a sweat fan and a foam disposer. In Approaching the Classics (Erya), the section on vessels states that a biao is called an nie. The commentary notes it is the iron piece at the side of a horse's bridle. In Explanation of Names (Shiming), it is said that biao means to contain; it is positioned at the side to contain and restrain the horse's mouth. In Cao Zhi's Poem in Response to an Edict (Yingzhao Shi), it says: The team of horses is majestic, tossing their bits and spraying foam. Also, in Broad Elegant (Boya), biao biao means flourishing. In Book of Odes (Shijing), in the Airs of Wei section, it says: The red ribbons are flourishing. The commentary notes that biao biao is the appearance of being flourishing. Also, as a phonetic supplement, it rhymes with the sound biao. In Han Yu's Oration for Member of the Ministry of Justice Mu (Ji Mu Yuanwai Wen), it says: When grass grows in spring, and birds sing in the morning. I hold the reins in my hand, and you raise your bit. (In this context, the character for morning is read as zhou).