Microsoft censors suggestions on its Bing search engine for American users looking up Chinese President Xi Jinping, the Tiananmen Square protests’ “tank man” and other politically sensitive terms, according to a new study. 

While typing in a term like “Joe Biden” into Bing results in a drop-down “autofill” box suggesting popular search options, Microsoft removed the box for American and Canadian users searching hot-button Chinese terms, researchers from Citizen Lab said. 

Other names allegedly censored by Bing include Li Wenliang, a doctor-turned-whistleblower in Wuhan who angered Chinese authorities by speaking out about the severity of the coronavirus in early 2020; Guo Wengui, an exiled Chinese billionaire affiliated with Trump adviser Steve Bannon; and Gedhun Choekyi Nyima, a key figure in Tibetan Buddhism who was kidnapped by Chinese authorities at the age of six.