Disk (bi) with raised uniform curls arranged in a grid

1. (Jeffrey Smith per Keith Wilson, July 8, 2008) "Ceremonial Object" added as secondary classification.

2. (Stephen Allee, March 25, 2009) As per Jenny F. So, Jade Project Database, changed Period One from "Eastern Zhou 周 to Western Han 漢 dynasty" to "Late Eastern Zhou 周 dynasty." Jenny F. So also gives Date as "475-221  BCE"; but as per Keith Wilson, current Date "3rd-1st centuries BCE" is changed to "5th-3rd century BCE,"  and current Title is changed from "Ritual disk, Bi 璧" to "Disk (bi 璧) with spirals," while Object Name "Disk (bi 璧)" is  changed to "Ceremonial Object," and "Warring States period" is added to Period Two. Changed Medium "Jade" to  "Jade (?)," as no scientific analysis is recorded. Added Measurements (Diam x D: 23.0 x 0.55; Diam [hole]: 7.4),  as per Christine Lee, Jade Project Database. Also added Description as per Jenny F. So, Jade Project Database.

3.  (Jeffrey Smith per Matthew Clarke, July 25, 2022) Medium changed from Jade (?) to Jade (nephrite).

4. (Najiba Choudhury per Keith Wilson, June 5, 2023) Period One changed from "Late Eastern Zhou dynasty" to "Eastern Zhou dynasty"; Title changed from "Disk (bi) with spirals" to "Disk (bi) with raised uniform curls arranged in a grid"; Date changed from "5th-3rd century BCE" to "475–221 BCE"; and added Chinese Translation by Jingmin Zhang.