What traditions did The Book of Songs and Li Sao respectively create in China's poetry creation?

The Book of Songs and Songs of the South are the most important poems of China in the pre-Qin period. One represents realism and the other represents romanticism, which has a great and far-reaching influence on later China's poems and even the whole ancient China literature. Although they all have many similarities because of the origin of China culture, they also have great differences in creative spirit, ideological content, language form, traditional moral concepts and artistic style due to their different times and regions, as well as their different identities, positions and experiences. Analyzing and comparing these similarities and differences is of great significance for better understanding and understanding the nature and characteristics of these two works.