Hai Collection, Upper Volume Radical: Carriage (mǎ) Entry: Shuang Kangxi Strokes: 21 Page 1444, Entry 04 According to Collection of Rhymes (Jiyun), Rhyme Meetings (Yunhui), and Orthodox Rhymes (Zhengyun), pronounced shuang. According to Jade Chapters (Yupian), the term su-shuang refers to an excellent horse of ancient times. It is also used as a variant form of the character pronounced shuang. As stated in the Zuo Tradition (Zuozhuan), during the third year of the reign of Duke Ding, when the Duke of Tang went to the State of Chu, he possessed two su-shuang horses. It is sometimes written as the variant form shuang. As stated in the Book of Jin (Jinshu), in the Biography of Guo Pu, the Kunwu blade was pulled out with a sharp tip, and the su-shuang horse raised its mane. The commentary notes that the character shuang used in the text should be written as the character shuang. Furthermore, according to Extended Rhymes (Guangyun), and also in Collection of Rhymes (Jiyun), Rhyme Meetings (Yunhui), and Orthodox Rhymes (Zhengyun), it is pronounced shuang. The meaning remains the same.