Tiananmen Square protest happened in 1989. There were tens of thousands of students demonstrating for the greater democracy in capital of China, Beijing. It reached at its peak On June 4, 1989. On that day, because protesters wanted to grieve the Hu Yaobang who was a pro-democracy and anti-corruption official, around 100,000 students went to gather at Tiananmen Square. Estimated 2,000 protesters were killed by Chinese government.
http://www.politicalforum.com/current-events/80800-tiananmen-square-20-years-later.html
