CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins79% CONFIDENCEOverall confidence: 79%How well the pin's source and references back up its dates.Weighted average of how firmly 3 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better6.9 years ago
Happened as dated, per the source[1]: "51WORLD ... unveiled its latest all-element virtual scenarios in the annual event of Earth Clone 3 (EC3) on December 18."Beijing-based 51World launched a real-time virtual replica of Shanghai spanning nearly 4,000 square kilometres, built from satellite, drone, and sensor data.