What are the characteristics of Huang Tingjian's poetry theory and creation?

In content, Huang Tingjian's poems don't pay more attention to political and social issues like his previous poets in Song Dynasty, but are more about writing scenery, singing and expressing inner feelings. In art, Huang Tingjian's poems have many characteristics: first, there are many allusions; The second is to be innovative and not to do anything for others; Third, it has a unique sense of humor.