Zi Collection, Upper Volume Radical: Jade (yù) Page 123, Entry 01 Pronounced zhui (rising tone). Meaning: hidden. Also, "Jade Compendium (Yupian)" explains it as thunder. Also, "Book of Rites (Liji), Yuzao" records "Walking upright, chin raised like an arrow." The annotation states that "chin" (yí) is sometimes written as "frost" (shuāng). "Explanations of Characters (Shuwen)" explains "frost" (shuāng), and Xu Miao pronounces it as "zhuī". Also, "Jiyun" is pronounced yan zhi (rising tone), same pronunciation as "yí". The meaning is the same. "Book of Rites (Liji), Yuzao, Explanations of Characters (Shuwen)" states that "frost" (shuāng) is also pronounced "yí". Also, "Jiyun" and "Leipian" are pronounced tu hui (rising tone), same pronunciation as "tuí". The meaning is the same.