What was the main theme of Mo Yan's novel?

Mo Yan's novels usually involve many topics and main ideas but there is no fixed and universal answer. Different novels may have different topics and ideas, but they are usually deeply influenced by Chinese culture, history and society. Mo Yan's novels often explored topics such as human nature, family, friendship, love, power, and fate. In his works, he often depicted Chinese rural life, traditional culture and historical events, as well as the complexity and variety of human nature. Mo Yan's novels also explored the good and evil in human nature, the conflict between morality and values, and the pursuit of freedom, equality, and happiness. Mo Yan's novels have complex motifs and topics. They reflect the current situation of Chinese society and culture, and at the same time, they explore the inner world and universal values of human beings.