What is tiananmen square copypasta?

The Tiananmen Square copypasta is a popular internet meme that originated from a 4chan post in 2009. The text is a sarcastic and satirical response to the Chinese government's censorship of the 1989 Tiananmen Square protests. The copypasta includes phrases such as "nothing happened in Tiananmen Square on June 4th, 1989" and "Tank Man simply lost his keys and was trying to get them back." The purpose of the copypasta is to mock the Chinese government's attempts to erase the memory of the Tiananmen Square protests from history. It has since become a popular form of online protest against censorship and authoritarianism. However, it is worth noting that the events that took place in Tiananmen Square were a tragic and significant moment in history, and should be remembered and discussed with sensitivity and respect.