"Tang Yun" (Tang Yun) uses "zhi" (zhī) as the cutting sound, and "Ji Yun" (Jiyun) uses "ying zhi" (yíng zhī) as the cutting sound, with the same pronunciation as "yi" (yí). "Shuowen Jiezi" (Shuowen Jiezi) explains it as a stone resembling jade. "Yupian" (Yupian) calls it a stone of five colors. "Guangyun" (Guangyun) states it is the name of a jade. Additionally, "Ji Yun" (Jiyun) also annotates the pronunciation as "ju zhi" (jū zhī) as the cutting sound, with the same pronunciation as "ji" (jī). The meaning is the same. In "Leipian" (Leipian), it is sometimes written as "yì" (yì).