Or the invasion of Vietnam... Or the annexation of Tibet... Or the bullying of Southeast Asian countries... Or the great leap forward... Or the communist land reforms... Or the anti counterrevolutionary campaigns
The CCP leaves you no end of really good options to pick here.
Yeah tiananmen is such a meme at this point. You can tell when people base their entire politics on memes and don't bother reading and searching on their own. Tiananmen is an issue they won't step mentioning.