To overcome the past and achieve the final stage of communism.
Explanation:
The permanent revolution is supposed to achieve in China is "to overcome the past and achieve the final stage of communism."
The above statement is by former President of China, Mao Zedong's belief. According to him, it is only the permanent revolution, a feeling of persistent revolutionary zeal, that could allow the Chinese to conquer their awful past and ultimately accomplish the last stage of communism.
Due to fertility of land in the south there was plenty of room for people to grow cash crops and start plantations, so they would need slaves to run the farms and plantations.