Official government announcements shortly after the event put the number who died at around 300
On 19 June, Beijing Party Secretary Li Ximing reported to the Politburo that the government’s confirmed death toll was 241, including 218 civilians (of which 36 were students), 10 PLA soldiers, and 13 People’s Armed Police, along with 7,000 wounded.[233][234] On 30 June, Mayor Chen Xitong said that the number of injured was around 6,000.
Tank Man survived, but not everyone was as lucky…
(Other estimates are much higher but still. And I don’t think this happened in the actual square, but rather in other places in Beijing)
https://en.wikipedia.org/wiki/1989_Tiananmen_Square_protests_and_massacre#Death_toll