Tang Yun (Tang Yun) states it is pronounced jian (falling tone), and Jiyun (Jiyun) states it is pronounced jian (falling tone). Both sources indicate the pronunciation is the same as the word for to tread. Shuowen Jiezi (Shuowen Jiezi) explains it as a footprint. Jiyun (Jiyun) notes that some versions also use a variant form (zhuan). It also appears in the term Changjian, which is a place name. Records of the Prime Minister of Chu, Sun Shu'ao (Chu Xiang Sun Shu'ao), state that in the same year he returned to the governor of Changjian. The Commentary (Zhu) explains: Emperor Wu of the Han dynasty acquired the former territory of the Xietu King, established Zhangye Commandery, and Changjian was under the jurisdiction of this commandery.