The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
Foreign Relations of the United States prints the joint statement under the dateline "Shanghai, February 27, 1972". It is often dated 28 February, the day it reached readers in the United States and the visit's last day; this pin follows the document's own dateline.
Quotes the communiqué's two Taiwan formulations directly and explains why each side stated its position separately.[1]
Places the document as the first of the three joint communiqués that frame US policy on Taiwan.[1]
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