Citation: Other stories as-covered by western media. The CPC has censorship laws, but when they actually publish official statistics on something, those are pretty accurate. Their estimate on Tiananmen fatalities is much more like the statistics published by most journalists than the 10k number or even that hack's revised 2k - 3k count, and their accounting of events is much more like the ones that have held up over time among western journalists (the square was cleared without killings, there weren't machine guns on rooftops, most protestors left peacefully, there was no mulching of corpses, etc.)
There were many estimates from western press at the time that were in the realm of reason, those claiming it was a few hundred dead. There's no excuse for the 10k guy unless you want to argue he suffers from hallucinations.
You're essentially relying on cultural osmosis from the same culture that uncritically parrots the 10k figure and other such nonsense that you see spouted on Reddit. If you keep digging, eventually you will find that just about every story holding up that Ba Sing Se vibe is a fabrication.