Yin Collection, Lower Volume Radical: Wide (guǎng) Kangxi Strokes: 7 Page 343, Entry 35 Pronounced xu. Classic of Rites (Erya): The walls on the east and west are called xu. Commentary: They are used to distinguish between the interior and exterior. Sub-commentary: This refers to the walls of the eastern and western chambers located on the hall in front of the main room. In the Collected Rimes (Jiyun), it is sometimes written in a variant form. Also, according to the Jade Chapters (Yupian), it refers to a school. Record of Rites (Liji), Royal Regulations (Wangzhi): The Xia dynasty had the eastern xu where they provided for the elders of the state, and the western xu where they provided for the common elders. Commentary: The eastern xu was the great school, located within the capital to the east of the royal palace. The western xu was the minor school, located in the western suburbs. Also, in the Hall of Distinction (Mingtangwei), it refers to the schools of the Xia dynasty. Mencius: In the Shang dynasty, it was called xu. Also, according to the Jade Chapters (Yupian), it refers to the order of seniors and juniors. Mencius: There is order between seniors and juniors. Also, according to the Broadening Refinement (Guangya), it refers to sequence. Book of Odes (Shijing), Greater Odes (Daya): Arranging the guests in sequence according to their virtue and ability. Supplementary Note (Jian): This refers to arranging the sequence according to the number of hits in an archery contest. Rites of Zhou (Zhouli), Spring Officials (Chunguan), Minor Minister of Ancestors (Xiaozongbo): In charge of arranging the sequence of the four seasonal sacrifices. Commentary: Arranging the chronological order of the sacrifices. Also, a surname. Book of Rites (Liji), Meaning of Archery (Sheyi): Xu Dian raised the wine cup. Sub-commentary: Xu is the surname, Dian is the given name. Also, in the Collection of Rimes (Yunhui), it is used interchangeably with xu (narrate). Erya, Preface and Sub-commentary: Narrating the purpose of the classic. Confucius wrote the preface (xu) for the Book of Documents (Shangshu), and Zixia wrote the preface (xu) for the Book of Odes (Shijing), which is why Guo Pu also refers to it as xu. Also, it is used interchangeably with xu (thread/clue). Han Yu, Epitaph for Master Zhenyao: The clue (xu) reveals itself to be long-reaching and increasingly prominent.