Lu Xun's theoretical knowledge of literature consists of two aspects:one is the theoretical knowledge of literature acquired by Lu Xun through various ways at all times and in all countries;the other is the new theoretical knowledge of literature created by Lu Xun on the basis of this knowledge.The theoretical knowledge is mainly related to a series of basic theoretical problems of literature,such as the origin of literature,the essence of literature,the aesthetic characteristics of literature as the spiritual product of human creation,tragic ch...