According to an analysis by Nicholas D. Kristof of The New York Times, "The true number of deaths will probably never be known, and it is possible that thousands of people were killed without leaving evidence behind. But based on the evidence that is now available, it seems plausible that about fifty soldiers and policemen were killed, along with 400 to 800 civilians." Globe and Mail correspondent Jan Wong placed the death toll at approximately 3,000,

44 hectares (440000 m2)Its north-south length is 880 m, the east-west width is 500 m, thus the total area of Tiananmen Square is 440,000 m2. It is the biggest city square in the world.

this event is called the protest at Tiananmen Square of 1989, aka the massacre at Tiananmen Square of 1989 or the June 4th incident.

on that day, students who held protests for democracy was killed by tanks and guns . however, that was only a peaceful protest before the massacre.

see reference link

Chinese Students gathered to call for political reform. ~novanet

In 1989, thousands of Chinese college students camped out in Tianamen Square protesting the government. After thirty days, government troops opened fire, massacring 800 of the students. Thousands more still remain in jail, and although the event is well-documented worldwide, there is no official Chinese record of it ever having occurred.

Tiananmen Square is a symbol of Chinese government oppression.

They did not run him over. After stepping in front of the tank, jumping on top and talking to the crew, he jumped off and blocked them again. At this point, two people in blue clothes took him into the crowd. Some people say this was the Chinese secret police and that he was executed. Others say he is still alive. No one knows for sure as there is no body, live or dead.

they achieve their goal

7 weeks!

hope i helped:)