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 "Han 漢 dynasty" to "Late Eastern Zhou 周 or Western Han 漢 dynasty"; changed Date from "3rd-1st centuries BCE" to "475--100 BCE"; and added Description. 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"; and added "Warring States period" to Period Two. Changed Medium "Jade" to "Jade (?)," as no scientific analysis is recorded. Added Measurements (Diam x D: 13.7 x 0.4; Diam [hole]: 4.2), as per Christine Lee, 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 6, 2023) Title changed from "Disk (bi) with knobs" to "Disk (bi) with raised hexagons arranged in a grid"; changed Period One from "Late Eastern Zhou or Western Han dynasty" to "Eastern Zhou or Western Han dynasty"; Geography changed from "China" to "China, purportedly found at Anhui province, Shou xian"; and added Chinese Translation by Jingmin Zhang.
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