People in China follow Confucius's way of living. They follow filial piety which means respect for your elders. Confucius believes that if everyone plays a role in society everything will be good.
Rape of Nanjing
Japan attacked Nanjing because they wanted their resources. They came in and killed, tortured and raped them. China was humiliated greatly.
China has really good geography. They have lots of natural resources. They are very ethnocentric. Japan and Europe both want control over China for the resources.
Opium is a drug that china was buying from the British. After awhile China refused to buy opium from the British, because it had great effect on people that were negative. This lead to a war.