關於「ARJ21-900」標籤，搜尋引擎有相關的訊息討論：

Comac ARJ21 - Wikipediaen.wikipedia.org › wiki › Comac_ARJ21Airlinerwatch on Twitter: "Chengdu Airlines takes delivery of its final ...twitter.com › airlinerwatch › status#arj21700 - Twitter Search / Twittermobile.twitter.com › hashtag › arj21700The second ARJ21 aircraft delive