Explanation: There's an invasion in Old Summer Palace made up of combined forces of eight countries. There's another one called Nanjing Massacre, that's when Japanese forces started a massacre in Nanjing, where 40,000 chinese were killed. A few European countries wanted China's wealth, the Chinese gave them pieces of land that they borrowed for a while because Chinese's forces were too weak at that time.
Is that enough? And also just to let you know, I'm also a Chinese.