In his poetry creation, Han Yu advocated that injustice should be heard. Han Yu believes that poetry is the catharsis of people's feelings. When people's inner grievances cannot be calmed down, they will be expressed through poetry. Han Yu advocates that poetry should express true feelings, have critical spirit and expose and accuse social reality. It embodies Han Yu's unique understanding of the function of poetry and Han Yu's sense of social responsibility and humanistic care as a writer.