A US teen's video clip accusing China of putting Muslims into "concentration camps" has gone viral on the Chinese-owned social network TikTok.
The post begins with beauty tips - but the young woman changes tack and asks viewers to raise awareness of what she describes as "another Holocaust".
Feroza Aziz later tweeted that TikTok had blocked her from posting new content, as a result.
TikTok has disputed this. "TikTok does not moderate content due to political sensitivities," a spokesman told BBC News.
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He said the company had banned one of Ms Aziz's old TikTok accounts on November 15 for posting an unrelated video that had broken its rules on terrorism-related material.
As an additional measure, it blocked her smartphone on November 25, but that too had been unrelated to her posts about China.
"Her new account and its videos, including the eyelash video in question, were not affected and continue to receive views," the spokesman added.
Aziz posted three videos about China's treatment of the Uighur Muslims, between Sunday and Monday.
The first has been watched more than 1.4 million times and "liked" nearly 500,000 times on the app.
A copy uploaded to Twitter by other TikTok users has attracted a further five million views.
They have also been posted to YouTube and Instagram.
Part of the videos' appeal is they are presented as a deliberate attempt to circumvent supposed censorship by TikTok's Beijing-based owner, Bytedance.
Aziz bookends her critical comments with talk about how to make eyelashes look longer. "I say that so TikTok doesn't take down my videos," she explains in one of the recordings.