已确认日期确定性: 已确认已公布为确定日期来源对日期的表述有多确定：已确认、已排期、预估、已推迟或未核实。显示所有“已确认”的图钉可信度 81%总体可信度: 81%该图钉的来源和参考资料对其日期的支持程度。包括来源在内的 5 份资料对图钉开始和结束时间支持程度的加权平均；资料每比最新的一份旧 180 天，权重减半显示所有可信度不低于 75% 的图钉
GE Aerospace[1][3], 30 Nov 2015: 'COMAC celebrated the delivery of the first ARJ21 yesterday to launch customer Chengdu Airlines during a special ceremony in Shanghai ... exactly seven years after it took its first flight'.COMAC handed the first ARJ21-700 (B-3321) to launch customer Chengdu Airlines at a Shanghai ceremony on 29 November 2015, seven years to the day after its first flight; the jet flew on to Chengdu the same day.
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