1. (J. Smith per Keith Wilson, 7/8/2008) Ceremonial Object added as secondary classification.
2. (Stephen D. Allee, 24 March 2009) As per Jenny So, Jade Project Database, changed Period One "Eastern Zhou dynasty" to "Late Eastern Zhou dynasty"; changed Date from "3rd century B.C.E." to "475-221 B.C.E.". As per Keith Wilson, changed Object Title from "Ritual disk, Bi" to "Disk (bi)"; changed Object Name from "Disk (bi)" to "Ceremonial object". Changed Medium "Jade (nephrite)" to "Jade (?), as no scientific analysis is recorded. Added Measurements (Diam: 14.35 x D: 0.40; Diam. hole: 4.08) as per Christine Lee, Jade Project Database. Added "Warring States period" to Period Two, as per Jenny So, Jade Project Database, and Keith Wilson. Added: "Xi'an, Shaanxi Province" to Geographical Origin.
3. (Jeffrey Smith per Matthew Clarke, April 25, 2022) Material changed from Jade (?) to Jade (nephrite).
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