I'm posting this photo because 35 years later, people in China and Hong Kong can't. https://en.wikipedia.org/wiki/1989_Tiananmen_Square_protests_and_massacre
1989 Tiananmen Square protests and massacre - Wikipedia

@brucelawson yes, it's forbidden to mention it on social media platforms in China, and it remains a shared trauma/tragedy for the Chinese who still remember it. However, I don't like how the western media portrays it. As a native Chinese, even after reading tons of information from different sources, I still can't get a full picture of it.