The Chinese army crackdown on the 1989 Tiananmen Square protests killed thousands of people, up to 10,000 according to released declassified UK documents. The figure was given in a secret diplomatic cable from then British ambassador to China, Sir Alan Donald written on 5 June 1989. The cable is in the UK National Archives, and was first reported by news website HK01.
Watch CASI's video on Tiananmen Square from Mr. Ken Allen who was there, on the ground, in Beijing, as the Assistant Air Attaché for the U.S. at:
https://www.airuniversity.af.edu/CASI/Articles/Article-Display/Article/3051566/competition-with-china-the-tiananmen-square-crisis/
Listen to the History Of China Podcast at for a recounting of the documents available on the matter at:
https://podcasts.apple.com/us/podcast/the-history-of-china/id741606139?i=1000657714548