The June 10th Movement was a protest that happened in China on June 10th, 1989. Back then, China was ruled by the Communist Party, which means that only one group of people had all the power and could make all the important decisions. Some people in China didn't like the way they were being ruled and wanted things to change.
On June 10th, lots of people gathered in Beijing, which is the capital city of China, to protest against the government. They wanted more freedom, democracy, and human rights. They also wanted the government to get rid of corruption, which means when people in power use their power in a bad way to benefit themselves.
The protesters stayed in Beijing for weeks and kept rallying for what they believed in. However, the government didn't like what they were doing and started using force to try to make them leave. This led to a violent clash between the protesters and the police, and unfortunately, some people got hurt or even died.
Eventually, the government won, and the protest was ended. But, the June 10th Movement became an important part of history because it showed the world that many Chinese people wanted to have more freedom and say in their country. Even though the protest didn't succeed, it inspired many other movements for democracy and human rights in China and around the world.