In 1989, tens of thousands of chinese began a protest
along the great wall
in shanghai
in tiananmen square
in guangzhou

The correct answer is:

In Tiananmen Square.

The Tiananmen Square protests (1989) were demonstrations led by students in Beijing violently repressed following Chinese Premier Li Peng declaration of martial law.

Troops fired at the protesters that were trying to block the military's advance towards Tiananmen Square. Civilian deaths have been estimated between 180 to 10,454 in what became known in the West as the Tiananmen Square Massacre.  

they died with poison from the god patrick