It's common knowledge for those old enough to remember it. It's never discussed or mentioned in school textbooks and is generally not even taught as a part of Chinese history. Evidence of this is an ad taken out in a local Chinese paper several months ago showing support for the "6-4 Mothers" (Mothers who lost their children on that day and have been fighting for recognition/apologies/etc.), 6-4 referring to June 4th. It managed to make it into the paper because the young clerk who verified the ad believed its sender that it was for some entirely unrelated event. The clerk didn't even know why the date was significant.
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It's common knowledge for those old enough to remember it. It's never discussed or mentioned in school textbooks and is generally not even taught as a part of Chinese history. Evidence of this is an ad taken out in a local Chinese paper several months ago showing support for the "6-4 Mothers" (Mothers who lost their children on that day and have been fighting for recognition/apologies/etc.), 6-4 referring to June 4th. It managed to make it into the paper because the young clerk who verified the ad believed its sender that it was for some entirely unrelated event. The clerk didn't even know why the date was significant.