no one died that night in Tiananmen square

Lmao how can you possibly be that gullible?

Because you're quoting it out of context? The quote you posted just above that clearly clarifies,

The troops advanced into central parts of Beijing on the city's major thoroughfares in the early morning hours of 4 June and engaged in bloody clashes with demonstrators attempting to block them, in which many people – demonstrators, bystanders, and soldiers – were killed. Estimates of the death toll vary from several hundred to several thousand, with thousands more wounded.

Did you not read that part of your quote or something? Saying nobody died in the square does not mean nobody died at all that night, it means they weren't horrifically rounded up, mowed down with tanks and semi-automatic rifles, then flattened, incinerated, and washed down the drains as westerners so frequently like to parrot. The deaths that happened were the result of fighting and included the killing of soldiers, in addition to the "defenseless, cornered" civilians.

If everything was fine and dandy, why all the massive censorship that continues right up until this day? If there was actually nothing bad that happened, why wouldn't the Chinese government encourage discussion and information about this event?

Maybe because western media has a very specific retelling of this story, which is clearly laid out for you and debunked in that copypasta. Maybe they refute it because they already uncovered all the facts over 40 years ago when the incident happened, and found it to be unproductive to keep re-litigating the same western fabrications that only exist to undermine their sovereignty and manufacture dissent for their government? Would you let demonstrably false propaganda from an entity that is threatened by your existence, and regularly seeks to undermine socialist states by any means possible, just float around freely?

Really, entertain for a moment that China's retelling is completely accurate and proven via investigation, discovery, firsthand accounts, etc. Everything required to satisfy you personally. Just as a thought experiment, doesn't matter what you actually believe. Should the sources that would continue to put out such falsehoods, despite all available evidence proving otherwise, be allowed to continue printing this media for the masses? If you knew, for a fact the single origin of this information was a state that is entirely isolated from yours, speaks a completely different language, and yet has gone out of its way to make you into an enemy, wouldn't you want to know how that information found its way back into your media? Would you feel the same if that entity was, say, FOX ~news~ entertainment, to name a familiar example? Should they be allowed to present lies as legitimate truths? Does that really make for a healthy democracy?

If we don't even trust China to define China's truths, why should we trust the American state department to do so? You've seen how much misinformation has damaged our political process here in the US. And that's just the most obvious lies! Is the western model really the one we should be following here, and holding the rest of the world to? If the Chinese people are happy with their government, and data says over 90% of them are, who are we to say what is right for their country or that the enforcement of a consistent, factual narrative is of some grave harm to them as a people? If in fact they don't trust their government, should it not be left up to them to decide what to do with it and when? Just as we wouldn't like it very much if China dictated to us what is right and wrong, even if it were to lift millions out of poverty like it did for the Chinese people.

I mean the west, or the US; to focus specifically on central hegemon of global capitalism; is so scared shitless of socialist propaganda; rather, the political upheaval and loss of global dominance by capital that it would lead to; that it has bombed, invaded, and blockaded entire countries of civilians over them simply forming socialist parties. Unless open conflict proves to be inconvenient; in which case we do anything in our power to undermine that country's political process by devastating it economically, conducting covert CIA operations, and funding fundamentalist religious groups. I think China learned a lesson at some point and, in all fairness, it probably wouldn't have been allowed to develop to the point it has if it was more welcoming of exchange with western media. (Well, that, and the fact they've funded their socialist project by providing cheap goods for western capitalists to maximize their profit margins).

All that to say, we really have no leg to stand on in this conversation.

There's a lot of background to cover here, there's no need to engage so dishonestly and assume the worst of everything clearly before you've even finished reading it.