1. (Jeffrey Smith per Keith Wilson, July 8, 2008) "Ceremonial Object" added as secondary classification.
2. (Stephen Allee, March 24, 2009) Jenny F. So, Jade Project Database, gives Period One as "Late Eastern Zhou 周 or Early Western Han 漢" and Date as: "475--100 BCE"; but as per Keith Wilson, changed "Han 漢 dynasty" to "Western Han 漢 dynasty" and changed Date from "3d--1st centuries BCE" to "2nd--1st century BCE." As per Jenny F. So, Jade Project Database, added Description and Related Works. As per Keith Wilson, changed Title from "Ritual disk, Bi 璧" to "Disk (bi 璧) with knobs"; changed Object Name from "Disk (bi 璧)" to "Ceremonial object." Changed Medium "Jade" to "Jade (?)," as no scientific analysis is recorded. Added Measurements (Diam x D: 14.5 x 0.35; Diam [hole]: 4.4), as per Christine Lee, Jade Project Database.
3. (Jeffrey Smith per Matthew Clarke, July 11, 2022) Medium changed from "Jade (?)" to "Jade (nephrite)."
4. (Najiba Choudhury per Keith Wilson, June 6, 2023) Title changed from "Disk (bi) with knobs" to "Disk (bi) with raised hexagons arranged in a grid"; Date changed from "2nd-1st century BCE" to "206 BCE-9 CE"; and added Chinese Translation by Jingmin Zhang.
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