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.
Happened as dated, per the source: "the Huajiang Grand Canyon Bridge opened to traffic on September 28 after more than three years of construction."
Construction cost of the bridge per Wikipedia[3] infobox.
Wikipedia[2] states 'the bridge was opened to the public on 28 September 2025' - an exact match for the pin's stored date.
Smithsonian Magazine confirms the Huajiang Grand Canyon Bridge 'opened to traffic on September 28, 2025' - an exact match for the pin's stored date.[1]
Opened primary project source for sourced buildout metrics and project timeline; researched 2026-10-29.[1]
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Crossing the deep Beipan River canyon in Guizhou took about two hours.
How: A bridge 625 m above the Beipan River that cuts the crossing time to about two minutes.