The videos taken by fellow passengers and posted to Twitter showed the man being forcibly pulled screaming from his seat by three security personnel.
Twitter -- along with other Western websites such as Facebook and Google -- is blocked on the mainland by the country's ruling Communist Party, which fears the unregulated spread of information it deems politically sensitive.
But footage of the Sunday showdown on the flight from Chicago to Louisville, Kentucky was reposted to China's Twitter-like Sina Weibo, where the subject quickly became the top trending topic, garnering over 120 million views and 80,000 comments -- many of them highly nationalistic in tone.
"Shameless! We won't forgive them. Ethnic Chinese around the world please boycott United Airlines!" wrote one commentator.
"There is a long history of discrimination against Asians. I hope Chinese people realize this reality and support domestic products," another user opined. "Don't feed those who look down on us!"
United Airlines claims itself to be the biggest carrier to China, with more nonstop US-China flights and to more Chinese cities than any other airline, according to their website.
The company did not immediately respond to an emailed request for comment, but its CEO Oscar Munoz apologized for "having to re-accomodate" customers such as the Chinese-American man, who was being contacted directly to resolve the situation.
"Asian American or not, as a consumer who paid for his ticket, he was treated like a prisoner," one Weibo commenter said. "Things are better here at home."
(This story has not been edited by NDTV staff and is auto-generated from a syndicated feed.)