They say they are just volunteers translating posts from the Chinese internet. State media call them "a despicable anti-China smear campaign" and "psychological warfare".
What is Elon Musk up to?
US politicians have written to the bosses of Meta, TikTok, Twitter and YouTube to request that the companies archive content that includes potential evidence of Russian war crimes in Ukraine.
Billionaire Elon Musk has said his Twitter deal is "temporarily on hold" over the company's spam and fake user accounts.
At first glance a photograph of Mars released by NASA appears to show a doorway carved into the rock.
Twitter has fired two top managers and paused hiring as part of an efficiency drive ahead of Elon Musk's planned $44bn (£36bn) takeover.
Plants have been grown in lunar soil for the first time - a milestone for lunar and space exploration.
The first image of the massive black hole at the centre of our Milky Way galaxy has been revealed.
Cryptocurrency values are taking a further pounding amid a resumption in a wider flight from risk over growing fears of an inflation-driven global recession.
Some ice shelves in the Antarctic have grown in the last two decades, in spite of human activity heating the planet, a study suggests.