What kind of narrative poems does Li Ji use in his works?

In Wang Gui and Li Xiangxiang, Li Ji's application of the poem "Loyalty to Heaven" does not give people a stiff feeling. But if you leave its contents, it may be inconvenient to use. After the founding of People's Republic of China (PRC), Li Ji continued to write narrative poems, such as "Chrysanthemum Stone" and "Biography of Levin", and no longer used the form of "believing in heaven". Therefore, how to absorb the artistic advantages of folk songs, and at the same time not stick to their forms, so that they can express the diversified life in different regions in modern times more flexibly, has been an unsolved problem in Wang Gui and Li Xiangxiang.