Wei Collection, Upper Volume Radical: Bamboo (zhú) 筵 Kangxi strokes: 13 Page 886, Entry 06 Pronounced yan (rising tone). Shuowen Jiezi (Shuowen) states: A bamboo mat. Book of Rites (Zhouli), Ministry of Rites: The official in charge of tables and mats includes two lower-ranking officials. The commentary states: A yan is a type of mat. The one spread on the bottom is called a yan, and the one spread on top is called a xi. By placing the yan on the bottom and the xi on top, seats are defined. Explanation of Names (Shiming): Yan carries the meaning of extending and spreading out. It is spread to be level and smooth, looking extended and flat. Book of Odes (Shijing), Lesser Odes: At the guest's initial spread of the mat. The commentary notes: A yan is a mat. Correct Meaning Thoroughly Compiled (Zhengzitong): The Imperial Lecture (Jingyan) is the place where the emperor listens to lectures and studies.