Since September 18,1931 the imperialists divided China into multiple parts and each took control of a section. The imperialists took control of the trading ports and many more important stations. The peasants were starving and had no rights .
The Chinese Communist Revolution was started by Mao Zedong, there were communists but there were also nationalists, which caused a civil war. The communists were supported by the Soviet Union and the nationalists were supported by the U.S., because the U.S. deeply feared the spread of communism.
The great Leap Forward was created by Mao and the goals of it were to make China more modern instead of a farming society. His ideas didnt work, such as new farming methods, requirements from citizens, etc. Everyone in the countryside was starving. In 1959 the Yellow River flooded and killed 2 million people. By the end 20 to 48 million people died in China, the great Leap Forward was a disaster and didnt even last 5 years as planned, it was put to an end after 3 years.